A case has been filed against four people including owners of the speedboat, in connection with the speedboat capsize in the Padma River that claimed 26 lives in Madaripur's Shibchar upazila on Monday. Sub-inspector of Char Janajat River Police Lokman Hossain filed the case at 12:30 am, said Miraz Hossain, officer-in-charge of Shibchar Police Station, Tuesday. Apart from speedboat owners Chandu Mia and Jahirul Islam, its driver Shah Alam and leaseholder of the Shimulia ghat Shah Alam have been made accused in the case. OC Miraz Hossain said  none of the four accused has been arrested yet. Also read: Speedboat sinks in Padma, 26 dead “The speedboat driver is now taking  treatment under police custody as he was shifted to Dhaka Medical College Hospital from Faridpur Medical College in critical condition,” said the OC. Inspector of Char Janajat river police check post, Abdul Rajjak said efforts are continuing  to arrest all the accused. Earlier, on Monday, at least 26 people died when the Banglabazar-bound speedboat from Shimulia ferry ghat capsized in the river after a collision with a sand-laden bulk carrier near Kathalbari ferry ghat in Shibchar. Twenty-six bodies were retrieved from the river with the help of divers from local Fire Service and Civil Defence, police and Coast Guard members. Also read: Speedboat sinks in Padma: Probe body formed A six-member committee was formed on Monday  to investigate the speedboat accident. The local administration formed the probe body after the accident, Mohammad Raihan, Fire Service and Civil Defence Headquarters Station Officer (Media cell), told UNB on Monday.