LONDON (AP) — Britain's defense minister apologized and his ministry suspended an official Tuesday after a “significant” data breach involving the email addresses of dozens of Afghan interpreters hoping to settle in the U.K.

A Defense Ministry email to more than 250 Afghans who are eligible for relocation and still remain in Afghanistan was mistakenly copied to all applicants Monday instead of blind copied. British media reports said the people whose email addresses were distributed included some individuals who are in hiding from the Taliban.

“It is an unacceptable level of service that has let down the thousands of members of the armed forces and veterans. On behalf of the Ministry of Defense, I apologize," Defense Minister Ben Wallace told Parliament.

Investigations are taking place, and officials will help provide security advice to those affected, Wallace added. He told lawmakers that authorities believe there are 900 “credible cases” of Afghan resettlement currently being processed.

The opposition Labour Party welcomed Wallace's apology but said actions matter more than words.

“These Afghan interpreters worked alongside our British forces and the Government rightly pledged to protect them," lawmaker John Healey said. "Ministers must make good on those promises now."

Defense Committee Chairman Tobias Ellwood, who like Wallace is a member of the governing Conservative Party, said: “The Taliban haven’t changed, they seek to exact revenge on anybody that worked for NATO. We must get these interpreters out or they’ll be hunted and killed.”

Britain’s government dispatched over 1,000 soldiers, diplomats and officials to Afghanistan in August to evacuate some 15,000 British nationals and Afghan allies after the Taliban took control of the capital, Kabul.