Former prime minister Datuk Seri Najib Razak is expected to be questioned at Bukit Aman soon over a Facebook page that allegedly insulted Selangor's Sultan Sharafuddin Idris Shah.

Bukit Aman CID D5 (prosecution and legal division) principal assistant director Senior Asst Comm Mior Faridalatrash Wahid said they had already contacted Najib over the matter.