Los Angeles, Jan 10 (IANS): Actor Sean Penn is now under investigation for secretly interviewing the Mexican drug lord Joaquín "El Chapo" Guzmán Loera, while he was evading authorities following an escape from a Mexican prison.

The Rolling Stone magazine has published the interview with Guzman which Oscar-winning Sean Penn conducted, reports people.com.

In an article posted on the magazine's website on Saturday night, Penn, 55, has posted details as to how he spent months organising an interview with one of the most wanted men in the world.

Since Penn had been in contact with Guzman for several months, authorities are presumably interested to find out why the actor did not earlier share any information on the wanted man.

In July 2015, Guzmán, the head of the Sinaloa drug cartel, escaped the Altiplano-I federal penitentiary using a secret tunnel. His escape prompted an international manhunt, which ended this week when he was recaptured on Friday.