New Delhi: A female bomber blew herself up in front of the office a senior Tamil leader in Colombo. The bomber killed one person and injured two others in the office of Douglas Devananda, the minister for social services, the Defense Ministry said in a statement. The minister was unhurt. On Tuesday, police had arrested a man and woman suspected of plotting to kill Devananda for the LTTE. Doughlas has been a target of LTTE for three years now and has survived several assassination attempts. The blast comes a day after LTTE chief Velupillai Prabhakaran called for a mass uprising by Tamils on the occasion of Heroes' Day. Prabhakaran has dismissed hopes of a political settlement with the Sri Lankan government. In what is seen as a veiled reference to India, he accused the international community of failing his fighters. President Mahinda Rajapaksa's government has “shut fast the door for peace” by continuing to attack, Prabhakaran said in his annual address on Tuesday. Sri Lanka's army won control of the eastern region in July after 14 years of fighting, leaving the LTTE holding areas in the north. The Tamil Tigers, designated a terrorist group by the US, the European Union and India, have been fighting for 24 years for a separate homeland in a conflict that has killed more than 70,000 people.