Prime Minister on Thursday said that the perpetrators of Mumbai blasts shall be pursued relentlessly and brought to justice quickly. Dr. Manmohan Singh said, the government will do everything possible to prevent such attacks in future. Prime Minister and Congress president Sonia Gandhi arrived in Mumbai on Thursday evening to asses the situation in the metropolis, which was hit by serial blasts yesterday. Dr. Singh assured the people that the perpetrators of the blasts shall be subject to the rule of law that they have sought to subvert.The prime minister and the Congress president met Chief Minister Prithviraj Chavan, Deputy Chief Minister Ajit Pawar, Home Minister R R Patil and top government officials in the Chhatrapati Shivaji Domestic Airport to review the steps taken for security in the city after the blasts. The prime minister and the Congress president also visited the victims injured in the blasts at hospitals.Meanwhile, life returned back to normalcy 24 hours after the blasts hit the city. The attendance at offices and schools was almost full, while business activities also resumed in full swing in the city.