LAHORE, Pakistan (Reuters) - Eight people were killed and 34 injured after a bomb blast ripped through a crowded commuter train in Pakistan on Tuesday, police said. The blast was the second to hit a train in the central province of Punjab in as many days. The explosion occurred at 7:35 a.m. (0235 GMT) as the train reached Walton railway station outside Lahore, a railway official said. The train was from Kasur, about 50 km (21 miles) south of Lahore. Officials earlier estimated five people had been killed and 20 injured. No other details were immediately available, and there was no claim of responsibility. On Monday a bomb exploded on an express train near Pattoki town in Punjab, killing at least seven people and wounding 35, police said. The train was headed from Lahore, the capital of Punjab province, to Quetta, capital of the southwestern province of Balochistan. Another blast outside a court in Sukkur town of the southern province of Sindh injured seven people on the same day. Punjab province Chief Minister Shahbaz Sharif had called Monday's blast "part of conspiracies of anti-Pakistan elements" and said the government would foil "enemies' nefarious designs". He did not specify these elements. Punjab has been hit in recent months by a wave of violence which authorities blame on rival militant groups of the majority Sunni and minority Shi'ite sects of Islam.