John Fredriksen’s Frontline is suing takeover target DHT Holdings and seeking to block its proposed $538m acquisition of the BW Group VLCC fleet so that its own offer can see a vote of DHT shareholders.

Frontline filed a 34-page complaint in New York Supreme Court Tuesday, on the same day it pitched a third offer to win control of New York-listed DHT, which is led by co-chief executives Svein Moxnes Harfjeld and Trygve Munthe.