Police killed 11 suspected gunmen in two shootouts this weekend in Mexico, officials said.

Five gunmen died in a shootout that lasted more than an hour in Los Mochis, a city in the northwestern state of Sinaloa, the state Attorney General's Office said.

The shootout started Saturday when police received an anonymous tip that several armed men were at a house.

The gunmen opened fire when officers arrived at the property, the AG's office said.

Officers called for reinforcements and engaged the gunmen, with more than 500 shots being fired in the incident, the AG's office said.

Police seized drugs, firearms and tactical gear at the house, officials said.

The other shootout occurred Friday afternoon, when Federal Police officers engaged gunmen on a road in Puente Nacional, a city in the Gulf state of Veracruz, killing six suspected criminals, state officials said.

Puente Nacional is near Xalapa, the capital of Veracruz.

The shootout started when police ordered a vehicle to stop and the occupants opened fire on officers, state officials said.

Six grenades, four rifles, ammunition clips and a vehicle were seized at the crime scene and turned over to prosecutors.

The war on drugs launched by former President Felipe Calderon, who was in office from 2006 to 2012, left about 70,000 people dead in Mexico, the government said.

About 20,000 people are listed as disappeared in the country, the non-governmental Movement for Peace with Justice and Dignity said. EFE