The low was centred about 695-km south of Chittagong Port, 605-km south of Cox's Bazar Port and 750-km south-southeast of Mongla Port in the afternoon.

"It is likely to intensify further and move initially in a northwesterly direction", said a special weather bulletin of Met office.

Maximum sustained wind within 44-km of the depression centre is about 40kph, rising to 50kph in gusts or squalls. Sea will remain moderate.

Maritime ports of Chittagong, Cox's Bazar and Mongla have been advised to keep hoisted local cautionary signal number one.

All fishing boats and trawlers over the north Bay and deep sea have been advised to come close to the coast and proceed with caution until further notice.