Indonesia will carry out its latest execution of drug smugglers late Thursday evening, according to a relative of a death row inmate.

Among those to be shot by firing squad are thought to be nationals of Indonesia, India, Pakistan, Nigeria, Zimbabwe and Sierre Leone.

Earlier Thursday, 14 coffins were seen being transported to a notorious island prison, Nusakambangan, where the executions are to take place.

Pratikno, who like many Indonesians uses one name, was quoted by kompas.com as saying, "Yes. It is final, executions will be carried out tonight."

Family members and lawyers of those set to be executed gathered at the prosecutors office in Cilacap, the port town on Java island nearest Nusakambangan.