Amnesty International has accused Russia and Syria's Bashar al-Assad-led government of targeting hospitals as a strategy of war in Syria.
An Amnesty report has documented evidence of six attacks on hospitals, medical centres and clinics in the northern part of the Aleppo between December 2015 and February this year.
Amnesty International Crisis Response director Tirana Hassan said: "Syrian and Russian forces have been deliberately attacking health facilities in flagrant violation of international humanitarian law.
"But what is truly egregious is that wiping out hospitals appears to have become part of their military strategy."
"The latest string of attacks on health facilities north of Aleppo appears to be part of a pattern of attacks on medics and hospitals, a strategy that has destroyed scores of medical facilities and killed hundreds of doctors and nurses since the start of the conflict."
The Syrian Network for Human Rights, a local human rights watchdog, claims that at least 27 hospitals, including eight in Aleppo province, have been targeted by Russian and Syrian government forces since September 2015.
Additionally, at least 13 hospitals have been attacked in Aleppo by airstrikes and one by a surface-to-surface missile on 15 February.
Physicians for Human Rights, a monitoring group, has documented 346 attacks against medical facilities in a period of five years, that killed 705 medical staff.
In a separate development, the US and Russia have entered into an agreement over the cessation of hostilities in Syria.
The two nations are co-chairs of the International Syria Support Group (ISSG) that aims for peaceful settlement of the Syrian crisis with support from the UN.