President Obama met Tuesday evening with his national security team amid reports that the Islamic State of Iraq and Syria (ISIS) was advancing toward toward the predominantly Kurdish town of Kobani on the border between Turkey and Syria.

The president and his top foreign policy aides met at the White House on Tuesday “to discuss our comprehensive strategy to counter the threat posed by [ISIS],” the administration said in a statement.

The meeting came as CNN reported that Turkish soldiers and tanks were massing at the border amid concerns about a flood of refugees entering the country ahead of advancing ISIS fighters. Sources told the network that ISIS fighters were within three kilometers of the northern Syria town late Monday.