Lahor. A blast at one of Pakistan’s oldest and most popular Sufi shrines killed at least four people and wounded 24 in the eastern city of Lahore Wednesday, police said, as the country marks the fasting month of Ramadan. Police have said they are still investigating the nature of the blast, which occurred near the entrance gate for female visitors to the 11th-century Data Darbar shrine, one of the largest Sufi shrines in South Asia. State TV aired footage showing damaged vehicles and emergency personnel at the scene. The shrine has been targeted previously — a 2010 suicide attack there killed more than 40 people — and is guarded by heavy security. Sufi worshippers, who follow a mystical strain of Islam, have frequently been the target of bloody attacks in Pakistan by Islamist terrorists — including the Islamic State group — who consider Sufi beliefs and rituals at the graves of Muslim saints as heresy.