After the death of the so-called bosses' boss, the organized crime killed four relatives of the marine that resulted dead in the operation against Beltran.

On Tuesday, another group killed Sinaloa state Tourism Minister Antonio Ibarra and his escort Encarnacion Garcia.

There was a clash in recent hours, between militaries and hired assassins in Michoacan state, with the death of supposed criminals as preliminary results.

Four more people were killed on Wednesday in Sinaloa, usual home to drug cartels in Mexico, and one of those murdered was a police agent, according to El Universal daily.

The other corpses, still unidentified, belong to two young men, with traces of tortures and shots in their heads, and a man about 40 years old, whose body was shot seven times.

The spokeswoman's escort also died on Wednesday in the Joint Operation in Sinaloa. The young soldier was shot dead.

Sonora state Cajeme municipality's Public Security Secretary Victor Landeros confirmed that seven low-impact and fragmentation grenades exploded in local public buildings in that territory.

He said the grenade explosions are a response to the policy implemented by President Felipe Calderon in the struggle against the organized crime.

At least two of the hired assassins that killed relatives of marine Melquisedet Angulo have been already arrested, Tabasco state Attorney Rafael Gonzalez reported.

According to federal government statements, these violent actions will not remain unpunished or make the authorities to give up their struggle against crime nationwide.