Mexican authorities are investigating the killing of a journalist in the southeastern state of Tabasco.

The Tabasco prosecutor's office says Ismael Diaz Lopez was stabbed to death Thursday in Teapa, south of the state capital of Villahermosa.

It reports via Twitter that the strongest line of investigation suggests a possible family conflict, given a prior legal history that it did not specify. His employer, the newspaper El Criollo, writes that Diaz Lopez had been involved in a domestic dispute. lat

However the Inter American Press Association on Friday urged an investigation into whether he may have been killed because of his journalistic work.

The media advocacy group said Diaz Lopez was slain inside his home by unknown intruders.

It said he worked for El Criollo and the newspaper Tabasco Hoy.