The director of national intelligence said Tuesday that the United States has not confirmed claims by the Islamic State in Iraq and Syria (ISIS) that it is responsible for a terrorist attack in Manchester, England.

“They claim responsibility for virtually every attack,” Dan Coats Daniel (Dan) Ray CoatsFBI chief says Russia is trying to interfere in election to undermine Biden The Hill's Morning Report - Sponsored by The Air Line Pilots Association - Trump, Biden renew push for Latino support Former Intel chief had 'deep suspicions' that Putin 'had something on Trump': book MORE told the Senate Armed Services Committee. “We have not verified yet the connection.”

Coats later added that the United States has confirmed the attack was carried out by a suicide bomber, though it's still assessing whether others were involved.

His colleagues in the intelligence community have been talking with their counterparts since the attack, and he has a call planned with his British counterpart for after the hearing, he said.

A suicide bomber set off an explosive as people were leaving a concert by American pop star Ariana Grande late Monday. Twenty-two people were killed and 59 injured.

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On Tuesday, ISIS said that one of its “soldiers” placed a bomb in the concert, according to the Site Intelligence Group.

Coats said, however, that the attack is a reminder that the threat of terrorism and ISIS is “not going away.” Despite losing much territory in Iraq and Syria, the group still has the ability to carry out attacks on the West, he said.

Asked whether retaking ISIS's de facto capital in Syria, Raqqa, is more imperative after the attack, Coats said “that won’t solve the problem” because of lone-wolf attacks and ISIS’s spread to other, ungoverned territory.

But, he added, “driving a stake through the heart” of ISIS will “significantly improve the situation.”

Sen. John McCain John Sidney McCainThe electoral reality that the media ignores Kelly's lead widens to 10 points in Arizona Senate race: poll COVID response shows a way forward on private gun sale checks MORE (R-Ariz.) opened the hearing by calling the terrorist attack in Manchester a “gruesome reminder that the world is on fire.”

“Everywhere we turn, we can see threats to the world’s rules based order that underpins global security and prosperity,” he continued.

McCain also questioned whether the Trump administration has a plan to address terrorism and other threats.

“I have heard few compelling answers,” he said, “about how the United States intends to use its alliances, its trade, its diplomacy, its values, but most of all its military to protect and defend our national interests and the rules based order that supports them.”

— This report was last updated at 10:16 a.m.