A suicide bomber attacked Indian road construction workers and their Afghan police escorts Thursday in southwestern Afghanistan, killing seven and wounding 12. The convoy had been traveling on a main road toward the city of Khash Rod in Nimroz province when it was hit by a remote-controlled bomb that was planted on a motorcycle, wounding one policeman, said Nimroz Gov. Ghulam Dastagir Azad. The convoy stopped after the first explosion, and a suicide bomber set off a second attack, killing six policemen and an Indian worker, Azad said. Ten policemen and two Indian workers were wounded.