An anti-narcotics court judge in the northern city of Rawalpindi has issued an arrest warrant for the candidate nominated for the prime minister's post by President Asif Ali Zardari. The judge on Thursday cited Makhdoom Shahabuddin's alleged role in a scandal involving the import of a drug that can be used to make methamphetamine. Shahabuddin, a member of the ruling Pakistan People's Party (PPP), filed his nomination papers on Thursday. Two other PPP leaders, Raja Pervez Ashraf and Qamar Zaman Kaira, also filed their nomination papers as alternative candidates. Al Jazeera's Imtiaz Tyab rports from Islamabad.