Buenos Aires:
A 22-year-old Argentine man said he killed six people because he made a pact with "Saint Death" in exchange for "protection and prosperity", police said.
Witnesses said the unidentified suspect became a serial killer to keep the promise he made to a popular pagan saint also known as "San La Muerte", who is venerated in jails and among criminal gangs.
The man is accused of having slain six men this year over a period of four months.
"One witness gave us the details of the pact (of the prisoner) with San La Muerte," a police spokesman said.
"We're studying a total of about 10 cases. In some cases we have already obtained positive photographic recognition," another police official said.