The decapitated bodies of three women and seven men have been bring into being in an abandoned lorry in the northern Mexican city of Torreon, police force say.
One head was set up on the windscreen. The others were dumped by the roadside, along with frightening mail.
They were establish after a night of fighting across northern Mexico.
National Security Spokesman Alejandro Poire accredited the beheadings to a battle flanked by two drugs gangs, the Zetas and the Sinaloa cartel.
Police supposed the 10 had almost certainly been killed a few days back, as the bodies were presentation signs of breakdown.
During the earlier night at least 40 people were killed in alleged drug-related violent behavior.
Mr Poire said the government was not leasing up in its fight next to the drug cartels. "The violence won't stop if we stop battling criminals," he said.
In January, the government of Presidentalleged more than 34,000 people had been killed in a four-year offensive beside drug gangs.
The figure is supposed to have risen significantly since then.