A car boobytrapped with explosives detonated Thursday, wounding four people, in a northeastern Syrian town taken by Turkish-backed forces from Kurdish fighters during Turkey’s invasion, Syrian state media and a war monitoring group said. The blast went off in the town of Tal Abyad outside the headquarters of a militia of Syrian fighters allied to Turkey, according to the SANA news agency and the Britain-based Syrian Observatory for Human Rights, which reported the injuries. Similar bombings have taken place in the past in another enclave held for several years by Turkey and its Syrian allies on the northwest part of the border.