Fifteen-year-old Sayed Ahmed martyred from a headshot in Sa'ar on Wednesday, Bahrain's Al Wefaq political party announced on its page on the social networking website Facebook.
The party stated that the victim had gone out to play and tried uselessly to run away when he noticed the security forces closing in.
The crowd amassed in their tens, carrying overhead Ahmed's coffin, which was plastered with the victim's picture before and after the shooting.
Joined recently by police units and troops from Saudi and the United Arab Emirates, the Bahraini government forces have launched a deadly crackdown on the popular revolution that began to sweep the Persian Gulf island on February 14.
Bahraini protesters continue to demand the ouster of the 200-year-old-plus monarchy as well as constitutional reforms.
Not counting the latest victim, at least 24 people have been martyred and more than 1,000 others injured during the government-sanctioned violence.
Also on Wednesday, the Human Rights Watch accused Bahraini forces of using violence against people that had already received injuries during earlier attacks.
