The United States has formally requested the extradition of a top Colombian paramilitary leader accused of drug trafficking and suspected in the murder of a state lawmaker.

U.S. officials issued the request Thursday for Diego Murillo, a member of the United Self-Defense Forces of Colombia [AUC].

Authorities described him as one of the most powerful and violent Colombian drug lords who destabilize Colombia and send what they call "poison" to the United States. Last year, a U.S. federal court indicted him on charges of conspiring to launder narcotics proceeds.

Mr. Murillo has played a role in demobilization talks with Colombian President Alvaro Uribe's government. Last month, President Uribe ordered Mr. Murillo's arrest for his alleged role in the murder of the state legislator.

Mr. Murillo later surrendered to authorities following a three-day manhunt.

Some information for this report provided by AP, AFP and Reuters.