Kurdish fighters and Islamic State militants continue to battle in the northern Syrian town of Kobani.
Plumes of smoke could be seen Tuesday from across the border in Turkey, as the two sides clashed again in the weeks-long fight that has drawn international support to help the Kurds hold off militant attempts to take the town.
The Britain-based Syrian Observatory for Human Rights said planes from the U.S.-led coalition also carried out fresh airstrikes in the area Tuesday targeting the Islamic State group.
On Monday, the U.S. dropped shipments of weapons, ammunition and medical supplies provided by Kurdish authorities in Iraq to the Kurds in Kobani.
Turkey also said it is helping Iraqi Kurds cross into Syria to help in the fighting there.