A police officer says a suicide bomber in a car attacked a convoy of foreign troops in the Afghan capital. Gen. Zulmay Khan Horiyakheil says the bomber struck the convoy in Kabul's western outskirts Sunday, but there was no immediate report of casualties. Representatives of NATO and US troops say they are checking the report. Insurgents regularly launch suicide attacks on foreign and Afghan troops throughout Afghanistan, but the number of such attacks in the capital has decreased over the past year. There are some 70,000 US and other NATO troops in the country. President Barack Obama's administration has indicated it will likely send 30,000 additional troops to turn the tide of Taliban gains in the country.