Maritime ports of Chittagong, Cox’s Bazar, Mongla and Payra have been advised to keep hoisted local cautionary signal no three as deep convection is taking place over the north Bay, reports UNB. Squally weather may affect the maritime ports, North Bay and adjoining coastal areas of Bangladesh, Met office said. All fishing boats and trawlers over North Bay have been advised to remain close to the coast and proceed with caution till further notice.