ISLAMABAD, Pakistan — Gunmen killed seven police officers guarding polio workers in two separate attacks in a suburb of Pakistan's largest city Wednesday, according to officials.
"These were trained assassins," said Feroz Shah, Karachi's deputy chief of police.
16:07 British police identify attacker who killed three in London rampage26
08:37 London attack: 7 arrests as police probe attacker's links25
02:48 5 dead in London attacks, including police officer and attacker, British police say48
23:42 New Yorker who was fatally stabbed by Maryland man loved meeting Hollywood stars20