A man was killed and 30 others were injured in a clash between two rival groups at Mithapukur upazila yesterday morning over land dispute. Police and eyewitnesses said the clash took place between the people of Sayeed Ali and Mamtaj Ali of Boalmari village under Gopalpur union when Mamtaj Ali and his supporters destroyed all the crops on the disputed land. During the clash, Anichul Haque Moshiur, 30, son of Mamtaj Ali, died, said police.