Man arrested over Colombia car bomb

The deadly bomb caused extensive damage

The authorities in Colombia have arrested a man believed to have been involved in an attack which killed at least five people - including a three-year-old boy.

More than 30 others were injured when a bomb was set off early on Thursday at the car park of the prosecutor general's office in Medellin.

The army made arrests in Medellin this week

The suspect was captured at a barber's shop while dyeing his hair a different colour.

Colombian police blamed left-wing rebels from the Revolutionary Armed Forces of Colombia (FARC) for the attack, saying it was in retaliation for a security forces operation this week.

Medellin police chief Leonardo Gallego Castrillon has offered more than $170,000 for information leading to the arrest of those responsible.

The city has in the past been the scene of violence between Colombia's left-wing rebels and right-wing paramilitaries.

Security operation

The bomb attack came after troops and police conducted house-to-house raids in poor neighbourhoods of Medellin in recent days, arresting more than 60 suspected FARC rebels.

Uribe has vowed to crush the rebels

Last week four people died in a car bomb explosion in eastern Colombia.

Thousands of people - mainly civilians - are killed each year in Colombia's long-running civil war.

President Alvaro Uribe - a former mayor of Medellin - has vowed to defeat illegal armed groups.