PARIS, Jan. 8-- The youngest of the three suspects in the Charlie Hebdo attack in Paris voluntarily surrendered himself Wednesday night to police in Charleville-Mezieres in the department of Ardennes, local media reported early Thursday.

The 18-year-old Hamyd Mourad may have helped the escape of two other suspects and has voluntarily surrendered himself to the police at around 11:00 p.m.local time "after seeing his name on social media," said local media, citing a source from the police.

Another source also confirmed that Hamyd Mourad "was arrested and put in custody."

A call for witnesses with pictures of the other two suspects, who are brothers, was aired. The other two suspects who are still at large were identified as Said Kouachi, 34, and Cherif Kouachi, 32. A massive manhunt for the suspects is under way.

Police warned that the pair are "likely to be armed and dangerous."

The attackers stormed the Paris offices of satirical weekly Charlie Hebdo on Wednesday, killing 12 people and wounded 11 others.

Charlie Hebdo, which is based in Paris' 11th arrondissement, was firebombed in 2011, due to the publishing of a controversial series of cartoons depicting the Prophet Mohammed.

In its last published cartoons, the weekly mocked Abu Bakr al- Baghdadi, leader of the Islamic State, which seized major towns in Iraq and Syria.

Shortly after the attack, French President Francois Hollande revealed that several terrorist attacks were stopped in recent weeks in France where anti-terrorism alert vigipirate plan has been raised to the highest level, in greater Paris area, which means a definite threat.

According to the Interior Ministry, 500 additional policemen are deployed in the capital and its suburbs to safeguard public places, including main tourism sites, train stations and stores.

An emergency government inter-ministerial meeting was held Wednesday afternoon in Elysee after Hollande visited the scene of France's deadliest such attack in more than half a century.

The last major attack in Paris was in 1995 when a terrorist bomb attack in the Paris subway killed eight people and wounded some 200 others.