An activist who alleges a global cover-up over the extent of pollution from the Fukushima No. 1 disaster is due in court in Victoria, Canada, on Wednesday over threats he allegedly made against the lives of two environmental scientists.

Dana Durnford is charged with two counts of criminal harassment for online videos attacking researchers Ken Buesseler of Woods Hole Oceanographic Institution in Massachusetts and Jay Cullen of the University of Victoria in British Columbia.

In expletive-laden recordings available until recently on the Internet, Durnford rails against the pair and other leading scientists and calls for their deaths.