In a statement, the TTP said that TLP was sacrificing for the protection of Namoos-e-Risalat and the TTP will stand by it.
The statement was issued by TTP spokesman Umar Khurasani who said that the group would avenge the killing of TLP workers killed in clashes with police.
Earlier, the government announced that it has decided to ban the TLP after the violent protests continued for the third day. Two policemen have been killed by the rioters while more than 300 are said to be injured.