Pakistan and India accused each other of violating a ceasefire deal made hours earlier on Saturday following U.S.-led talks aimed at ending the most serious military confrontation between the nuclear-armed rivals in decades.

Indian Foreign Secretary Vikram Misri said late Saturday that "there had been repeated violations of the understanding arrived between the two countries" on ceasing fire and accused Pakistan of breaching the agreement.

Multiple explosions were heard in two large cities of India-controlled Kashmir on Saturday, hours after the countries agreed to the deal. 

"We call upon Pakistan to take appropriate steps to address these violations and deal with the situation with seriousness and responsibility," Misri said at a news conference in New Delhi. He said the Indian army was "retaliating" for what he called a "border intrusion."

Pakistan's foreign ministry blamed Indian forces for initiating the ceasefire violation and said Islamabad remained committed to the agreement.

WATCH | Pakistan, India agree to immediate ceasefire: 

Pakistan, India agree to immediate ceasefire following weeks of deadly clashes

India and Pakistan on Saturday confirmed a ceasefire deal after U.S.-led talks to end a conflict between the nuclear-armed rivals.

"We believe that any issues in the smooth implementation of the ceasefire should be addressed through communication at appropriate levels," the ministry said. "The troops on the ground should also exercise restraint."

The deal had been expected to bring a swift end to weeks of escalating clashes, including missile and drone strikes, triggered by the massacre of tourists by gunmen last month that India blames on Pakistan, which denies the charge. Dozens of civilians have been killed on both sides since then.

The first word on the deal came from U.S. President Donald Trump, who posted on his Truth Social platform that he was pleased to announce India and Pakistan had agreed to a full and immediate ceasefire.

"Congratulations to both Countries on using Common Sense and Great Intelligence."

Pakistani Foreign Minister Ishaq Dar announced the truce on Geo News, saying that Saudi Arabia and Turkey played an important role in facilitating the deal.

Pakistani Prime Minister Shehbaz Sharif said in a speech Saturday that his country agreed to the ceasefire in the larger interest of peace in the region and hoped all the outstanding issues with India, including the long-running dispute over the Kashmir region, would be resolved through peaceful dialogue.

"It was agreed between them that both sides would stop all firing and military action on land, and in the air and sea. Instructions have been given on both sides to give effect to this understanding," he said.

WATCH | What's happening between India and Pakistan?: 

What’s happening between India and Pakistan?

The recent violence between India and Pakistan marks a major resurgence in the fight over the long-disputed region of Kashmir. CBC’s Salimah Shivji breaks down what triggered the current conflict.

Hours after the agreement, explosions heard by residents in Srinagar and Jammu in India-controlled Kashmir were followed by blackouts in the two cities. There were no immediate reports of casualties.

Omar Abdullah, the region's top elected official, said in a post on social media: "What the hell just happened to the ceasefire? Explosions heard across Srinagar!!!"

Broader agreement in the works

Conflict between India and Pakistan is not rare. The two countries have periodically engaged in wars, clashes and skirmishes since gaining independence from British India in 1947.

The announced ceasefire in the latest hostilities came after the countries fired volleys of cross-border missile strikes Saturday, when India said it targeted Pakistani airbases after Islamabad fired several high-speed missiles at military and civilian infrastructure in Punjab state. Pakistan said it responded with retaliatory strikes. 

In a G7 statement, the foreign ministers of Canada, France, Germany, Italy, Japan, the U.S., Britain and the European Union said they "strongly condemned" the April 22 Islamist militant attack in Kashmir.

U.S. Secretary of State Marco Rubio said he and Vice-President JD Vance had engaged with senior officials from both countries over the past 48 hours. They included Sharif and Indian Prime Minister Narendra Modi, India's External Affairs Minister Subrahmanyam Jaishankar, and the Pakistani Chief of Army Staff Asim Munir.

Rubio said the two governments agreed to "start talks on a broad set of issues at a neutral site."

Though Pakistanis had initially celebrated their army's retaliation, they were later jubilant about the truce, saying it was a moment of national pride and relief after days of tension.

In Islamabad, Zubaida Bibi expressed her joy at the restoration of peace with India.

"War brings nothing but suffering," she said. "We are happy that calm is returning. It feels like Eid to me."

Indian strikes hit Pakistani airbases

Tensions have soared since the attack at a popular tourist site in India-controlled Kashmir left 26 civilians dead, mostly Indian Hindu tourists, on April 22.

Earlier Saturday, India's military held a press briefing in New Delhi, saying Pakistan had targeted health facilities and schools at its three airbases in Kashmir.

"Befitting reply has been given to Pakistani actions," Indian Col. Sofiya Qureshi said.

WATCH | Winnipeggers worry about relatives in India, Pakistan: 

Winnipeggers from India, Pakistan worried about relatives as tensions rise

Hostilities between India and Pakistan continue to intensify in the Kashmir region, with each accusing the other of aggression. With no signs of tensions easing, some Winnipeg residents from India and Pakistan say they're worried about relatives back home.

Indian missiles targeted Nur Khan airbase in the garrison city of Rawalpindi, near the capital Islamabad, Murid airbase in Chakwal city, and Rafiqui airbase in the Jhang district of eastern Punjab province, according to Pakistan's military spokesperson.

There were no immediate reports of the strike or its aftermath from residents in the densely populated Rawalpindi.

Pakistan's military had said it used medium-range Fateh missiles to hit an Indian missile storage facility and airbases in the cities of Pathankot and Udhampur. Army spokesman Lt.-Gen. Ahmad Sharif said the country's air force assets were safe after the Indian assault.

The Associated Press could not independently verify all the actions attributed to Pakistan or India.

Explosions reported in India-controlled Kashmir

After the announcement of Pakistani retaliation, residents in Indian-controlled Kashmir said they heard loud explosions at multiple places, including the large cities of Srinagar and Jammu and the garrison town of Udhampur.

"Explosions that we are hearing today are different from the ones we heard the last two nights during drone attacks," said Shesh Paul Vaid, the region's former top police official and Jammu resident. "It looks like a war here."

Vaid said explosions were heard from areas with military bases, adding it appeared that army sites were targeted. Residents living near Srinagar's airport, which is also an airbase, said they were rattled by the explosions and booming sound of jets.

"I was already awake, but the explosions jolted my kids out of their sleep. They started crying," said Srinagar resident Mohammed Yasin.