Mexican Federal police
Gunmen have ambushed and shot dead four policemen and injured another five in central Mexico, officials have said.
They said the policemen were responding to reports of a traffic accident in a rural area of Michoacan state when the attackers opened fire, reports Reuters.
The police were ambushed between the cities of Brisenas and Sahuayo.
No group has so far claimed responsibility for the attack in the state, which has been plagued by drug-related violence.
The Knights Templar and New Generation drug cartels vie for control of the illegal drugs trade in Michoacan.
Earlier this month, the Brisenas police chief and three other officials were kidnapped by unidentified attackers and are still missing.
Some 60,000 people have died across Mexico since 2006 when the government deployed the military against the drugs gangs.
Earlier this month, President Enrique Pena Nieto announced the creation of a new national force as part of continuing efforts to tackle crime and violence.
Pena Nieto, who took office on December 1, said the new militarised force would initially be 10,000 strong.