FARC has reacted to the arrest of one of its members, warning the move is an obstacle to peace.

Colombia's former rebel group FARC has reacted to the arrest of one of its members on drug charges, warning the move is an obstacle to peace.

Colombian federal agents arrested Seuxis Paucias Hernández Solarte, alias "Jesús Santrich," on Monday. 

A FARC spokesman said in a statement that Santrich's arrest was the "worst moment" of the peace process. Santrich was a member of FARC's main delegation at the negotiations that led to the peace deal being announced in Cuba.

Santrich and three others face extradition to the US.

Santrich was a prominent member of the FARC, a guerilla group formerly known as the Revolutionary Armed Forces of Colombia that signed a peace agreement with the Colombian government in 2016.

Under that agreement, former FARC combatants were allocated 10 seats in Colombia's congress until 2026. Santrich was one of FARC's candidates in last month's congressional elections.

Santrich was indicted by a grand jury in Southern District of New York on a narco-trafficking charge.

An Interpol red alert said Santrich conspired to export cocaine to the United States between June 2017 and April 2018.