Kathmandu, Nov. 19 -- Durga Prasain, a medical entrepreneur and political activist, was arrested on Monday from his Bhaktapur residence for the fifth time in the past several months, just days before his group plans nationwide protests.

The Kathmandu District Police said he was detained over concerns for public safety and national security amid his group's plans for nationwide protests starting November 23.

His arrest has sparked strong reactions from his supporters, who submitted a 24-hour ultimatum to the District Administration Office, Kathmandu demanding his unconditional release.

The police have obtained permission to keep Prasain, a medical entrepreneur, in custody for four days.

Members of the Citizen and Government Rescue Camp...