KABUL, April 11 (Xinhua) -- The death toll in the deadly shooting in Afghanistan's western Herat province has climbed to 11 as four more of the victims succumbed to their injuries, a provincial official said Saturday.

Unknown armed men opened fire on a group of people at a picnic site in Injil district of Herat on Friday, leaving seven dead and injuring 13 others, according to the Ministry of Interior Affairs.

While a suspect has been arrested, no group or individual has claimed responsibility for the bloody shooting.