WASHINGTON (Reuters) - U.S. Immigration and Customs Enforcement agents have arrested 2,901 convicted criminal aliens in the biggest operation of its kind, the agency said on Wednesday.

The seven-day operation involved arrests in all 50 states and four U.S. territories, ICE said in a statement.

All those arrested had criminal convictions. More than 1,600 had felony convictions, including manslaughter, attempted murder and drug trafficking.

Forty-two of those arrested were gang members, and 151 were sex offenders.

"The results of this targeted enforcement operation underscore ICE's ongoing commitment and focus on the arrest and removal of convicted criminal aliens and those that game our nation's immigration system," ICE Director John Morton said in the statement.

(Reporting by Ian Simpson; Editing by Jerry Norton)