“Gunmen attacked a polio vaccination team in one of Pakistan’s restive tribal regions on Monday, killing a policeman who was providing security, officials said,” Agence France-Presse reports (5/20). “Local government administrator Faramosh Khan [said] the gunmen attacked the team on Monday in the town of Mamound in the Bajur tribal area, just as it had started a vaccination drive,” and “[n]o one has claimed responsibility for the shooting, but suspicion will likely fall on Islamic militants suspected in similar attacks,” the Associated Press writes. “It’s unclear whether the campaign will continue after Monday’s attack,” the news agency notes (Khan, 5/20). “Pakistan, Afghanistan and Nigeria are the only countries where polio is endemic,” AFP notes, adding, “Polio cases in Pakistan hit 198 in 2011, the highest figure for more than a decade and the most of any country in the world, according to the U.N.” (5/20).