In one of the heaviest bombardments so far against the Sunni jihadists encircling Kobane yesterday and today, coalition air strikes "destroyed" two IS staging locations, a building, a truck, two vehicles, three compounds and damaged several other targets, it said.
A separate air raid in eastern Syria struck a small oil refinery, it said.
"Indications are that air strikes have slowed ISIL advances" around Kobane, US Central Command, which is overseeing the air campaign, said in a statement.
The air strikes are designed to "interdict" IS reinforcements and resupply efforts as well as prevent the group from "massing combat power" against the Kurdish-held parts of Kobane, it said.
More From This Section
US fighter jets and bombers took part in the raids along with aircraft from Saudi Arabia, according to Central Command.
The IS group has steadily gained ground around Kobane and has reportedly captured nearly half of the town, which lies close to the Turkish border.
Central Command also said coalition warplanes carried out one air raid in Iraq in the past 24 hours, southwest of Kirkuk, destroying two IS vehicles.