No. 326.
Article 186 of the Mexican Penal Code.

Any crimes that may be committed on the territory of a foreign state by a Mexican against Mexicans or against foreigners, or by a foreigner against Mexicans, may be punished in Mexico, in conformity with the laws of the country, under the following provisions:

I.
That the accused party should be in Mexico, whether of his own free will or by having been extradited.
II.
That a proper complaint should be made by the legitimate party in case the guilty person should be a foreigner.
III.
That the accused party should not have been tried in the country where the crime was committed, or, in case he has been tried, that no acquittal, amnesty, or pardon should have been pronounced in the matter.
IV.
That the violation of which he may be accused should be considered a crime both in the country where it was committed and in Mexico.
V.
That the crime should be liable, in accordance with the laws of Mexico, to a more severe punishment than that of arrest.