Peru has offered a $50,000 reward for the capture of a high-ranking leader of the Shining Path rebel group.
Shining Path has been in decline for more than 10 years
A poster with a picture of the man, known as Artemio has been released, with a phone number and e-mail address.
This month, a masked man claiming to be Artemio threatened to resume violence if jailed rebel leaders were not freed.
Shining Path rebels launched a campaign of violence 24 years ago, but their activities declined after the capture of the group's founder, Abimael Guzman.
The Peruvian interior ministry published a "Wanted" poster with a photograph of an expressionless Artemio dressed in civilian clothes on its website.
It said it was offering the reward for information which would lead to the capture of the man it referred to as the head of the last remnants of subversion in Peru.
"Comrade Artemio" made his threat during an interview taped in the jungles of central Peru.
In the interview, broadcast by America Television and RPP radio, Artemio wore a ski-mask which completely covered his face, as well as camouflage trousers and a black t-shirt.
Guzman is alleged to be leading the group from jail
He appeared in the company of several men dressed in the same way.
He called on the government to find a political solution to the conflict and said: "We're giving the government 60 days to respond."
He threatened "the renewal of armed activities", which he said included sabotage and assassinations.
Peru's Interior Minister Fernando Rospigliosi has said the government will respond "drastically and swiftly".
The pro-Communist group waged a bloody offensive against the Peruvian government in the 1980s and 1990s during which thousands of people died.
Since the capture of its leader, the group has become a shadow of its former self, says the BBC's Hannah Hennessy in Lima.
Sporadic attacks have been carried out on security forces in recent years.
In March 2002, the Shining Path was blamed for a car bomb attack near the US embassy in Lima that killed 10 people.