Boston fire chief resigns after criticism of bombing response

(CNN) -- Boston Fire Chief Steve Abraira, whose deputy chiefs criticized him over his handling of the Boston Marathon bombings, has submitted his resignation, the Boston Fire Department said Monday on its official Twitter account.

Abraira's resignation is effective Friday.

In an April 26 letter to Boston's mayor, 13 Boston deputy fire chiefs said they had no confidence in Abraira, asserting that he failed to assume command responsibility or show any leadership at the scene.

"At a time when the city of Boston needed every first responder to take decisive action, Chief Abraira failed to get involved in operational decision-making or show any leadership," the letter read.

CNN obtained the letter from a deputy chief who signed it but requested anonymity.