A woman suspected in the murder of a Paraguayan anti-mafia prosecutor was expelled from El Salvador on Saturday and handed over to Colombian authorities, the Colombian prosecutor's office said.

Margareth L Chacon Zuniga is accused of being involved in the "planning, financing and logistics of the murder of prosecutor Marcelo Pecci" and on Sunday was scheduled to appear before a supervisory judge, the investigative body said on Twitter.

Her capture brings to seven the number of people detained over Pecci's murder in May last year.

The prosecutor was killed in front of his pregnant wife, Paraguayan journalist Claudia Aguilera, while they were on their honeymoon on the Colombian island of Baru, near the tourist port of Cartagena on the Caribbean coast.

Just two hours before the attack, Aguilera had posted a picture on her Instagram account announcing that they were expecting a baby, the BBC reported. Aguilera has recounted that two men arrived on the beach on a jet ski or small boat. One approached Pecci, and "without a word," shot him twice.

El Salvador's Justice Minister Gustavo Villatoro earlier announced Chacon's expulsion on Twitter, accompanied by photographs showing the 42-year-old Colombian woman being escorted by Interpol agents as she boarded a plane.