DAMASCUS, May 8 (Xinhua) -- At least two people were killed and four others were wounded on Wednesday by the blast of a motorcycle in northern Syria, a war monitor reported.

The booby-trapped motorcycle went off in the western countryside of the Kurdish-controlled Manbij city in the northern countryside of Aleppo province in northern Syria, the Syrian Observatory for Human Rights said.

A day earlier, a similar blast rocked the city of Manbij, causing losses.

The Kurdish militia groups usually accuse the Islamic State of carrying out such explosions.