A female Japanese journalist was killed Monday while covering clashes in Syria's Aleppo, the Britain-based Syrian Observatory for Human Rights said, adding that three other reporters were missing.

The Japanese reporter was killed at Suleiman al-Halabi, a district in the east of Syria's second city where troops and rebels were locked in clashes. The added that one of two missing Arab reporters is a Lebanese woman and the other is a man working for a US media outlet. The third missing reporter is Turkish.