Controversial Rashtriya Janata Dal Lok Sabha member Mohammed Shahabuddin was convicted on Thursday by a Bihar court for assaulting a CPI-ML worker eight years ago.

Judicial Magistrate Vishwa Vibhuti Gupta found the jailed MP guilty of the charges after the completion of the trial inside Siwan jail.

The quantum of the sentence would be announced on Friday.

The case relates to an attack on CPI-ML's office at Khurmabad in Siwan town on September 19, 1998 in which Shahabuddin and his armed supporters were alleged to have exploded bombs, damaged furniture and assaulted office secretary Keshav Baitha.

The FIR in the case was filed on October 7, 1998 on the statement of Baitha under Sections 323 (voluntarily causing hurt), 341 (wrongful restraint), 342 (wrongful confinement) and 448 (house trespass) of the Indian Penal Code and Arms Act.

Shahabuddin, MP from Siwan, is facing 34 cases, including those of murder, attempt to murder, kidnapping and violation of Foreign Exchange Act and Arms Act.

Chargesheets have been filed in all these cases.

Baitha, who was brutally assaulted by Shahabuddin, and his men, had also received splinter injuries in the bomb explosion.

It is for the first time that Shahabuddin -- arrested in Delhi in November 2005 -- has been convicted in a criminal case.

The Siwan Administration had twice booked him under the Crime Control Act on February 18, 2005 and October 6, 2005.

Kaushalya Devi, mother of former Jawaharlal Nehru University president Chandrashekhar, who was shot dead at Siwan on March 31, 1997, allegedly by Shahabuddin's henchmen, was a witness in the this case.