Seven labourers were killed and eight injured when a tipper carrying them met with an accident at Luhajhar Ghat in Odisha's Gajapati district on Tuesday, police said.The truck loaded with bricks was on its way to Paralakhemundi from Gumma block along with the labourers when its driver lost control while negotiating a turn and the vehicle overturned and fell down the ghats. Five labourers died on the spot whereas two succumbed at the District Hospital in Parlakhemundi, police said.Police along with locals rushed to the spot and launched a rescue operation.