The defence ministry said it intercepted 50 Ukrainian drones overnight
Shakib on Tuesday inked the agreement with former national team sponsor Grameenphone for an undisclosed sum at a time when he was also leading a players' strike for better pay and benefits.
"We believe there was a contractual and procedural breach in his contract. Of course, we will take action against it," Bangladesh Cricket Board (BCB) chief executive officer Nizamuddin Chowdhury told AFP.
BCB president Nazmul Hassan said they will seek compensation from both Shakib and the phone company.
"We are going to take legal action. There is no scope to spare anyone. We will seek compensation from both the company and the player," Hassan said in an interview with Bengali newspaper Kalerkantho on Saturday.
"We thought it's a kind of 'I don't give a damn to the rules of Board' attitude. If that is the case, of course, we will take tough action," he said.
Grameenphone - which is majority owned by Norway's Telenor - was the sponsor of Bangladesh Cricket Board during the period of 2009-2011.
Hassan said the Board incurred huge losses after the company signed players individually instead of bidding to become the team sponsor in 2015 when a rival operator won the deal.
"This is why we barred the players to sign any agreement with telcos... yet, he (Shakib) did this. And you see the timing? Agreement after stopping play. These are audacious behaviour," he said.
The BCB president also criticized Shakib for his on-field performance.
"We defeated England and Australia in our own ground. Now we lost to Afghanistan. If I was responsible I would not show my face let alone stage a protest," he added, referring to Bangladesh's 224-run loss in one-off Test against Afghanistan in early September when Shakib was captain.
Shakib led a players' strike on Monday which follows increasing criticism from players that the Bangladesh Cricket Board was not sharing its wealth.
The players called off the strike late on Wednesday and started training on Friday for next month's India tour as the BCB accepted most of their demands.
The defence ministry said it intercepted 50 Ukrainian drones overnight
Media reports had suggested the trip would begin as soon as Sunday and last two days
Visitors can enjoy movies with family favourites, including ‘The Jungle Book’, ‘Jumanji’ and ‘Zootopia’ to match the wild theme every evening from 8pm
Sheikh Mohamed conveyed his congratulations to all eight honourees, recognising their inspiring efforts and significant contributions in service to society
His father thanked everyone who participated in the search mission despite the challenges posed by flooding in various parts of the emirate
It will be humid by night and Sunday morning with a probability of mist formation over some coastal and internal areas
Nearly 6,000 volunteers linked to a single support group are working tirelessly across the country to help those affected
Real estate developer MAG pledges to cover all the costs of necessary repairs for affected residents