London ? British police have arrested three more people in the alleged plot to blow up U.S.-bound airliners departing from London.

The three, Mohammed Yasar Gulzar, Mohammed Shamin Uddin and Nabeel Hussain, are charged with conspiring to commit murder and preparing to commit terrorism by helping in an alleged plan to smuggle explosives aboard the planes, police said.

Eleven people now have been charged on those two counts. Four others were charged with lesser offenses, including having knowledge of a terrorist activity but not disclosing information about it.

All three men will be arraigned today.