A bomb sent to journalist Lenin Artieda of Ecuavisa TV exploded at his workplace in the port city of Guayaquil
A bomb sent to journalist Lenin Artieda of Ecuavisa TV exploded at his workplace in the port city of Guayaquil AFP

Letter bombs addressed to journalists were sent to three TV stations in violence-plagued Ecuador Monday, one of which exploded without causing casualties, officials and the outlets reported.

The prosecutor's office said it had opened an investigation into the crime of "terrorism," without stating why the three stations were specifically targeted, or by whom.

In the port city of Guayaquil, journalist Lenin Artieda of the Ecuavisa private TV station received an envelope containing a pen drive which exploded when he inserted it into a computer, his employer said.

Artieda sustained light injuries to one hand and his face, said police official Xavier Chango. No-one else was hurt.

Chango said the USB drive sent to Artieda could have been loaded with RDX, "a military-type explosive."

Elsewhere in Guayaquil in Ecuador's southwest, the prosecutor's office said a letter bomb was also sent to the offices of TC Television.

The Teleamazonas chain later said it had also received a USB stick at its offices in Quito "with the same characteristics" as the one sent to Ecuavisa.

Chango had earlier said police were investigating two suspect envelopes sent to media outlets in the capital, but the fourth case has not been confirmed.

The Fundamedios NGO which advocates for press freedom, said the three "attacks used the same modus operandi."

Envelopes with USB sticks were addressed to Artieda as well as to Mauricio Ayora of TC Television and Milton Perez of Teleamazonas, it said in a statement.

The envelope addressed to Artieda contained a threat against the journalist, said Fundamedios.

The one to Teleamazonas, it added, contained a note that claimed the stick contained information on "Correismo" -- a political movement named after former president Rafael Correa.

The letters represented "a new escalation in violence against the press, said Fundamedios, and called for "immediate intervention of the State".

The government said in a statement it "categorically rejects any form of violence perpetrated against journalists and media outlets."

Any attempt to "intimidate journalism and freedom of expression are repugnant," it added.

The CDH human rights watchdog also condemned the attacks on media "in the context of growing insecurity in Ecuador."

Ecuador is sandwiched between Colombia and Peru, the world's two largest cocaine producers, and has itself become a hub for the global drug trade in recent years.

Guayaquil is one of its most violent cities, with frequent clashes between criminal gangs disputing drug trafficking routes.

President Guillermo Lasso has declared war on gangs who control the drug trade from prisons engulfed by extreme violence and riots that have left more than 400 inmates dead since 2021.

Ecuador has seen its murder rate jump from 14 per 100,000 inhabitants in 2021 to 25 per 100,000 in 2022.

Last year, the RTS TV station came under gunfire attack, and in 2020 a bomb exploded at Teleamazonas.