ISLAMABAD (Reuters) - The Taliban warned the government on Tuesday they would punish any move to release Raymond Davis accused of murdering two Pakistanis in a case that has inflamed already strained ties with Washington. Washington insists Davis has diplomatic immunity and should be released but the Pakistani government says the matter should be decided in court. If (Pakeistani) rulers hand him over to America then we will target these rulers. If Pakistani courts cannot punish Davis then they should hand him over to us, said Azam Tariq, spokesman for the Tehrik-e-Taliban Pakistan (Taliban movement of Pakistan). We will give exemplary punishment to the killer Davis. On Thursday, the United States is expected to present a petition to a Lahore court to certify that Davis has diplomatic immunity and should be released. The warning from Taliban group, which has kept up suicide bombings to destabilise Pakistans government despite several army offensives, underscores the charged atmosphere surrounding Davis case. Jamaat-e-Islami accused the United States of exerting unprincipled and unlawful pressure on Pakistan. Why is America hell bent on trampling on Pakistani law and its judicial system? We will forcefully protest if he is released without a court order, JI deputy chief Liaquat Baluch told Reuters. Of course he (Davis) should not be released.