They had fled across the border to Bangladesh amid heavy fighting between the Myanmar military and rebel insurgents in Rakhine
The statement, released after the top court delivered its verdict on Tuesday, called for a daylong general strike for Wednesday.
“In protest against the government’s conspiracy to murder Mr Mir Quasem Ali and demanding his release, we announce a dawn-to-dusk shutdown for Mar 9 across Bangladesh,” reads the statement.
Mir Quasem, founding president of the Islami Chhatra Shibir, is a member of the Jammat’s Central Executive Council and the organisation’s fifth most important leader.
He is also known as the party’s financial backbone.