Thousands of ethnic Tamils and their supporters, many wearing cloth gags, staged a silent march through Paris Tuesday to denounce what they called the international community's indifference to Sri Lanka's civil war. The protesters also decried the recent killing of hundreds of ethnic Tamil civilians in the country's north. "For 35 days we've been mobilized in Paris, and for 35 days we have not been heard," said Mahinthan Sivasubramaniam, who heads a French Tamil activist group. "Silence is a communication tool for us." Health officials in Sri Lanka have said at least 378 civilians were killed in an artillery barrage in rebel territory that ended Sunday morning. The rebels and the Sri Lankan government blame each other for the attack, which the United Nations on Monday condemned as a "bloodbath."