Colombo, April 22: A day after three cities in Sri Lanka were ravaged by fatal bomb blasts killing upto 290 people, the police in Colombo found upto 87 bomb detonators at the capital's main bus stand. Security check-up has been escalated in the vicinity of the bus stand, which is being frequented by commuters from all parts of the city.

Meanwhile, the government on Monday blamed a Sri Lankan Muslim outfit for the horrific serial bombings which killed 290 people in the country on Easter Sunday and said the attacks were "a colossal intelligence failure". Sri Lanka Blasts: 7 Suicide Bombers Behind Easter Sunday Terror Attack Linked to Local Jihadist Group, Says Top Official.

The National Thowheed Jamath (NTJ) carried out the eight explosions across three cities in Sri Lanka, also injuring over 500 people, the government told the media.

Health Minister Rajitha Senaratne said: "National Thowheed Jamath was involved. It is a local organisation. We don't know whether they are linked to outsiders. All those arrested are locals."

Senaratne, who was addressing the media along with other Ministers, called the well-planned attacks a "colossal intelligence failure" and stated that despite receiving prior information, the attacks could not be prevented, media reports said.

The Minister said that on April 4, international intelligence agencies -- which he did not identify -- had warned of these attacks and even mentioned that the targets would be churches and tourist destinations.

The Inspector General of Police was informed of this on April 9, and even names of suspected terrorists were given to him, Senaratne said.

He said the country's Security Council wanted to meet on Sunday but it did not happen as President Maithripala Sirirsena was overseas.

"As a government, we apologize to families and other institutions. The problem is that even when we met the Prime Minister at the Cabinet meeting, the Prime Minister was also in the dark," he said. "He had seen this circular only when we did. He was left out of Security Council meetings."

Two Sri Lankan Ministers, Mano Ganesan and Harin Fernando, also stated on Twitter that the government had prior information about an impending attack.

Calling for the resignation of the Inspector General of Police, Senaratne said: "This morning (Monday) the President, the Prime Minister and State Defence Minister met for the first time. We need a unified political leadership today to overcome this situation and we will take every action to eradicate terrorism from our country."

Sri Lanka has been plagued in recent times by an unseemly conflict between the President and the Prime Minister.

(With IANS inputs)

(The above story first appeared on LatestLY on Apr 22, 2019 04:29 PM IST. For more news and updates on politics, world, sports, entertainment and lifestyle, log on to our website latestly.com).