Factbox: Security developments in Pakistan

ISLAMABAD (Reuters) - Following are security developments in Pakistan at 0645 GMT on Thursday.

MARDAN - A boy in a school uniform blew himself up at a Pakistani army recruitment center in the northwestern town of Mardan, killing at least 20 cadets, officials said.

NORTH WAZIRISTAN - Taliban militants shot and killed two policemen, a school teacher and a construction worker, government officials and residents said. Notes left beside the bullet-riddled bodies said they were killed "because they are American spies."

(Compiled by Zeeshan Haider; Editing by Michael Georgy)