WASHINGTON (Reuters) - Two U.S. senators criticized the Justice Department's plea deal with Boeing ( BA ) struck in July and said the government should take action against the planemaker's executives "responsible for safety failures," according to a letter seen by Reuters.

Democratic Senators Richard Blumenthal and Elizabeth Warren in a letter dated Wednesday to the Justice Department said the government had failed to hold Boeing ( BA ) accountable for a a series of safety issues in recent years.

"It is past time for DOJ to take action against corporate executives at Boeing ( BA ) who are responsible for putting passengers and workers at risk in violation of federal laws and regulations," the letter said.

Boeing ( BA ) declined to comment. The Justice Department confirmed it had received the letter and declined to comment.