Summary:
At least 20 people have been killed in clashes between police and criminals in Mexico, officials say.

Full article:
(CNN) -- Clashes between criminals and federal police left 22 people dead in Mexico, including two officers, authorities said. The additional 20 people killed are suspected criminals, federal police said in a statement. The fighting in Michoacan state on Tuesday also left 15 injured. The clashes followed six planned attacks by criminals in different areas of the state, including gunbattles on blocked streets with cars, according to the federal police. Federal officials are searching for those responsible and reinforcing security to ensure the region is safe.