KABUL — A suicide car bomber attempting to strike an international military convoy on the outskirts of Kabul wounded at least 24 people today, including nine NATO service members, on a road that has become a frequent target.

With violence increasing, Britain's prime minister suggested 5,000 more NATO troops could be deployed to bolster the 71,000 NATO troops already here, while Germany said it would be sending more than 100 extra soldiers in January.

NATO's top commander in Afghanistan, U.S. Gen. Stanley McChrystal, has asked for an extra 40,000 U.S. troops to be sent to Afghanistan, but President Barack Obama has not made a decision yet.

NATO said today's bombing occurred on the Jalalabad road, which is used extensively by international forces and is frequently attacked. In August, another suicide bomber targeted a NATO convoy there, killing at least eight people.

The alliance said nine international service members and 10 civilian contractors, as well as several Afghans, were wounded in today's attack, which occurred near a logistics base for U.S. forces. The Interior Ministry said five civilians had been wounded.

Taliban spokesman Zabiullah Mujahid sent The Associated Press a message saying the bombing was carried out by one of its militants.