KABUL, Afghanistan, Jumada II 20, 1432, May 23, 2011, SPA - NATO says four of its service members have been killed in an explosion in eastern Afghanistan. The international military alliance says the blast happened Monday but does not provide further details or the troopers' nationalities, according to a report of the Associated Press. The latest deaths bring to 26 the number of NATO personnel killed in Afghanistan this month; 177 have been killed since the start of the year. --SPA 15:04 LOCAL TIME 12:04 GMT www.spa.gov.sa/895591