It centred about 645 km south of Chittagong Port, 555 km south of Cox's Bazar Port and 665 km south-southeast of Mongla Port in the morning.

"It is likely to intensify further and move in a west-north-westerly direction", said a special weather bulletin of Met office.

Maximum sustained wind within 44 km of the depression centre is about 40 kph rising to 50 kph 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 north Bay and deep sea have been advised to come close to the coast and proceed with caution till further notice.