Mexican troops fight Sinaloa drug cartel

By Mica Rosenberg and Anahi Rama

CULIACAN, Mexico (Reuters) - Thousands of troops rolled into Mexico's violent Sinaloa state on Tuesday to fight a powerful drug cartel run by the country's most wanted man, following a wave of police murders.

Armed, camouflaged soldiers arrived in military transport planes as helicopters hovered overhead in the state capital, Culiacan, and troops joined federal police to set up roadblocks and patrol streets.

Dozens of Hummer military vehicles, some with heavy machine guns, roared through the hot, rundown city on their way to the nearby town of Navolato, passing a bullet-ridden police vehicle on a tow truck.

As troops arrived in Culiacan, rival gunmen faced off in a battle near the city center, killing one man with an AK-47, a municipal police spokeswoman said.

Marijuana-producing Sinaloa, on Mexico's Pacific Coast, is home to a federation of drug gangs run by Joaquin "Shorty" Guzman.

He escaped from prison in a laundry van in 2001 and has declared war on rival cartels for control of lucrative smuggling routes into the United States.

"The last few weeks have been very violent in Sinaloa, with deaths and executions, with a bigger show of arms, brutality and firepower," Attorney General Eduardo Medina Mora told a news conference after a meeting with President Felipe Calderon's top security officials in Culiacan.

Interior Minister Juan Camilo Mourino said 2,723 troops, federal police and investigative police were arriving in Sinaloa to supplement the 2,000 soldiers involved in drug eradication efforts in the state.