Protesters gather outside Terminal 4 at JFK airport in opposition to U.S. president Donald Trump’s proposed ban on immigration, New York City, January 28, 2017. REUTERS/Stephen Yang

President Donald J. Trump tweeted on Monday morning that airport delays over the weekend were caused by a computer outage at Delta Airlines (DAL), protesters, and the “tears of Senator Schumer.”

Only 109 people out of 325,000 were detained and held for questioning. Big problems at airports were caused by Delta computer outage,….. — Donald J. Trump (@realDonaldTrump) January 30, 2017

protesters and the tears of Senator Schumer. Secretary Kelly said that all is going well with very few problems. MAKE AMERICA SAFE AGAIN! — Donald J. Trump (@realDonaldTrump) January 30, 2017

Trump’s decision to sign an executive order on Friday that temporarily bans individuals from seven Muslim-majority countries — Syria, Sudan, Yemen, Iran, Iraq, Libya, and Somalia — from entering the United States sparked protests at major airports nationwide over the weekend. The executive order also temporarily suspends refugees from entering the US.

On Sunday, Delta experienced a system outage that caused 170 flights to be canceled. The airline said in a statement on Monday that another 110 flights had been canceled due to the IT system outage.

“I want to apologize to all of our customers who have been impacted by this frustrating situation,” Delta’s CEO Ed Bastian said in a statement. “This type of disruption is not acceptable to the Delta family, which prides itself on reliability and customer service. I also want to thank our employees who are working tirelessly to accommodate our customers.”

Senator Chuck Schumer (D-NY) teared up during a press conference in New York City as he addressed the immigration ban, calling it “mean-spirited” and “un-American.”

Shares of Delta Airlines were down by 0.6% in pre-market trading on Monday.

—

Julia La Roche is a finance reporter at Yahoo Finance. Follow her on Twitter.



Read more: