Police are investigating Selangor Menteri Besar Azmin Ali under the Sedition Act 1948 over billboards put up across the state calling for former opposition leader Anwar Ibrahim to be freed from jail.

Azmin, who is also PKR deputy president, was summoned to the Petaling Jaya district police headquarters to have his statement recorded over the case.

The Gombak MP, who was accompanied by several PKR lawmakers, was questioned for more than an hour beginning at 4.10pm.