NEW YORK (AP) – The federal agency responsible for ensuring the safety of US airports has acknowledged an increase in the number of its employees who stopped work partial government shutdown .

Employees of the Transportation Security Administration are expected to work without pay during the closure because their work is considered essential.

TSA has stated in a statement Friday the number of calls that started during the vacation period has increased. The agency did not specify the number of calls from its employees who were called, but indicated that internal calls had "minimal impact, as 51,739 employees support the screening process." According to the release, waiting times "could be affected" but until now "remain in TSA standards".

"The TSA is closely monitoring the situation," the agency statement said. "The effectiveness of security will not be compromised."

The Department of Homeland Security and President Donald Trump on Saturday rejected the suggestion that incoming calls were a "disease" with significant consequences for air travel in the United States. White House officials and congressional aides were in talks Saturday to end the closure, which came in its 15th day. Negotiations are stalled over Trump's $ 5.6 billion claims to fund a wall at the US-Mexico border.

TSA spokesperson Michael Bilello tweeted 5.5% of the TSA's workforce at the Dallas / Fort Worth International Airport called Friday, against 3.5% on a normal day. He added that waiting times "could be affected", but that all passengers would be controlled normally.

Hydrick Thomas, president of the National Union of TSA Employees, told CNN that nearly 170 TSA employees at John F. Kennedy Airport in New York called every day of the week. Union officials did not respond to requests for comments on Saturday.

Airport officials said that no unusual delays in filtering had been found at JFK airport, at O ​​'Hare and Midway airports in Chicago or at the airport. Miami International Airport.