At least four Sunni Muslim candidates who appear to have won parliamentary seats on the winning ticket of secular leader Ayad Allawi have become targets of investigation by security forces reporting to the narrowly defeated Iraqi Prime Minister Nouri al Maliki, according to interviews Saturday with relatives, Iraqi security forces and the U.S. military.

All four candidates ran in Diyala province, a restive mainly Sunni area north of Baghdad. One candidate who won more than 28,000 votes is being held incommunicado in a Baghdad jail, two other winners are on the run and the whereabouts of the fourth, a woman, are unknown.