An international rights group says forces loyal to Ivory Coast President Alassane Ouattara have killed nearly 150 people since mid-April, in attacks aimed at real or perceived supporters of former president Laurent Gbagbo.

Human Rights Watch says in a report released Thursday that the pro-Ouattara Republican Forces killed at least 95 unarmed people in Abidjan during April and May. It says most of those killed were young people from ethnic groups generally aligned with Mr. Gbagbo.

The group says it documented an additional 54 extrajudicial killings at formal and informal detention sites in the city.

Human Rights Watch says it presented its findings to Ivory Coast's interior minister . It said the minister promised to discuss the findings with top officials, and vowed the government would not protect military and security forces from prosecution.

Mr. Ouattara's forces gained control of Abidjan after capturing Mr. Gbagbo April 11 at the presidential palace. Mr. Gbagbo had refused to leave power after losing the November presidential election.

Thousands of people were killed and displaced during the four-month power struggle in the West African nation.

Human Rights Watch says pro-Gbagbo forces killed more than 220 civilians during the final stages of the battle for Abidjan. It says those forces killed at least 80 the day after Mr. Gbagbo was captured, targeting people from northern Ivory Coast and neighboring West African countries for their presumed support for Mr. Gbagbo.

President Ouattara has promised to bring to account fighters on both sides who possibly committed war crimes.