Gabungan Parti Sarawak (GPS) has held former prime minister Dr Mahathir Mohamad responsible for the rise of "Sarawakians for Sarawak" sentiment in the Borneo state.

GPS secretary-general Alexander Nanta Linggi claimed Mahathir had short-changed Sarawak, which resulted in the rise of regionalism.

"Mahathir has expressed regret that some people had brought up ideas like 'Sarawak for Sarawakians' and 'Sabah for Sabahans'.

"He said there's no need...