Manhattan federal prosecutors have added six counts of attempted murder to the eights counts of actual murder facing the alleged West Side truck terrorist Sayfullo Saipov, according to newly filed court papers.

Prosecutors with Manhattan US Attorney Geoffrey Berman on Wednesday told a Manhattan federal judge that a grand jury has handed up yet another superseding indictment in the high-profile case, which accuses Saipov, 30, of using a Home Depot rental truck to mow down dozens of pedestrians while speeding through a bike-only path in lower Manhattan last Halloween — killing eight.

The Paterson, NJ, resident, who was arrested after he was shot by NYPD, asked if he could fly an ISIS flag inside his Bellevue Hospital room following the attack, the feds have said.

On Wednesday, prosecutors said they added six counts of attempted murder in aid of racketeering, each of which carries a potential sentence of 10 years. They also added eight new counts of assault with a dangerous weapon in aid of racketeering, each of which carries a maximum term of 20 years each.

Saipov already faces the death penalty after he was slapped with eight counts of murder last year. He has also been charged with violence and destruction of motor vehicle, which also carries a potential death sentence.

The feds have asked that Saipov be arraigned on the new charges Friday.

His lawyer didn’t immediately return a request for comment.