The Britain-based Syrian Observatory for Human Rights and Turkey's state-run Anadolu agency both reported today's incident in the rebel-held northwestern Syrian town of Atmeh.
The Andalou agency said several people were killed and wounded.
The town of Atmeh hosts a sprawling camp for thousands of displaced Syrians. It wasn't immediately clear who operate the hospital, nor who may have carried out the bombing.
A February 20 car bomb targeted the Bab al-Salama border crossing in another part of northern Syria. The region is contested between rebel brigades and an Al-Qaeda breakaway group, the Islamic State in Iraq and the Levant.