Police have arrested a 21-year-old man after seizing mephedrone, a banned drug, worth Rs 10.40 lakh from his possession in Maharashtra's Thane district, an official said on Tuesday, reported news agency PTI.

During routine patrolling, a police team spotted the man moving in a suspicious manner on Goandevi Mandir road in Bhayander area on Saturday, senior police inspector Rahul Rakh of the Mira Bhayander-Vasai Virar police's central crime unit said.