Krejcir due in court

The Czech fugitive and six others are accused of conspiring to kill two investigators.

Czech fugitive Radovan Krejcir. Picture: Christa van der Walt/ EWN.

JOHANNESBURG - Czech fugitive Radovan Krejcir and six others are expected to appear in the Alexandra Magistrates Court this morning.

The group is accused of conspiring to kill two investigators earlier this year.

The police say more arrests are expected in connection with the plot to kill Colonel Nkosana 'Killer' Ximba from the police's national crime intelligence unit and private investigator Paul O'Sullivan.

O'Sullivan says he's already met with the National Prosecuting Authority to request that Krejcir be placed in solitary confinement.

"He's running his criminal empire from prison using cellphones through the contact he has with corrupt officials."

O'Sullivan says if the magistrates court doesn't implement these strict conditions he'll approach the high court.

Authorities say the investigation is now at an advanced stage.

It's unclear when the arrests might be made or whether police officers might be among the suspects.

Krejcir is also being investigated on charges of kidnapping and attempted murder related to a drug deal gone wrong.

The Czech fugitive's fourth bail application was denied last week and he is expected to remain behind bars until his trial begins on 5 May.