Mexican officials said at least 44 people were killed on Friday during a clash between security forces and armed civilians in western Mexico, the bloodiest incident caused by violent drug gangs.
Government officials said two police officers were killed in the clash along with 42 armed civilian casualties in the state of Michoacan near the border with Jalisco.
Officials gave no further information about the identity of the gunmen involved in the clash.
Gang related violence case is a serious issue for Mexico since the gang groups have high number of members and gun power, claiming many lives in the clashes against the government forces.
In the last eight years, gang related violence caused more than 100,000 deaths despite a slowdown in recent years since the President Nieto took office at the end of 2012.
The Jalisco New Generation cartel, which is based in Jalisco region, has been becoming a major trouble for Nieto this year. According to the government, the cartel killed around 25 police officers and soldiers since March.