Per NBC News reporter Jonathan Allen, the Biden campaign is halting its outgoing communications and working to pause television ads after the shooting at former President Donald Trump's campaign rally.

The alleged shooter at former President Trump's rally in Pennsylvania today was confirmed to be male, two law enforcement sources told CBS News. His identity, however, has not been released.

President Biden spoke briefly to members of the press following reports that former President Donald Trump had been injured in an apparent shooting at a campaign rally earlier Saturday evening. Biden declined to say whether he thought the incident was an assassination attempt, saying he did not have enough facts to make such a statement at this time.

"There is no place in America for this kind of violence," Biden said. "It's sick.

"It's one of the reasons why we have to unite this country," he went on, adding, "We cannot allow for this to be happening. We cannot be like this. We cannot condone this."

A message posted to X from the official POTUS account said that Biden was "grateful to hear that [Trump is] safe and doing well. I’m grateful to hear that he’s safe and doing well. I’m praying for him and his family and for all those who were at the rally, as we await further information."

"There is absolutely no place for political violence in our democracy," former President Barack Obama wrote on X. "Although we don't yet know exactly what happened, we should all be relieved that former President Trump wasn't seriously hurt, and use this moment to recommit ourselves to civility and respect in our politics. Michelle and I are wishing him a quick recovery."

President Biden has been briefed on the Trump rally in Pennsylvania, according to ABC News and pool reports.

The president was in Delaware attending church when former President Donald Trump appeared to be hit by apparent gunfire while speaking at the event.

Biden has been receiving updates from Secret Service Director Kimberly Cheatle, Homeland Security Secretary Alejandro Mayorkas and Homeland Security adviser Liz Sherwood-Randall.

Saturday's apparent shooting at former President Donald Trump's campaign rally in Butler, Pa., is being investigated as a "possible assassination attempt," officials briefed on the matter told ABC News.

An alleged shooter and a Trump rally attendee are both dead, according to an Associated Press report.

The Butler County district attorney confirmed both deaths to the outlet.

Former President George W. Bush issued a statement: “Laura and I are grateful that President Trump is safe following the cowardly attack on his life. And we commend the men and women of the Secret Service for their speedy response.”

Former President Donald Trump was "grazed by gunfire" during Saturday's rally in Pennsylvania, Butler County District Attorney Richard Goldinger told Washington Post reporter Meryl Kornfield. The person who fired the shots is dead, according to Goldinger.

Sen. Chuck Schumer of New York posted to X: “I am horrified by what happened at the Trump rally in Pennsylvania and relieved that former President Trump is safe. Political violence has no place in our country.”

Rep. Hakeem Jeffries of New York, the Democratic minority leader, said in a statement posted to X, "My thoughts and prayers are with former President Trump. I am thankful for the decisive law enforcement response. America is a democracy. Political violence of any kind is never acceptable."

Pictures taken showed former President Trump bleeding from his ear as the Secret Service rushed him off stage. Trump's campaign released a statement following the incident in Butler, Penn., saying he was "fine."

Independent presidential candidate Robert F. Kennedy Jr. took to X to denounce the "violence" that took place during former President Donald Trump's rally today in Western Pennsylvania.

"Now is the time for every American who loves our country to step back from the division, renounce all violence, and unite in prayer for President Trump and his family," the Kennedy posted on X.

California Gov. Gavin Newsom said in a post on X that "violence has NO place in our democracy"

"My thoughts are with President Trump and everyone impacted at the rally today," he wrote.