PESHAWAR - As many as nineteen suspected militants were killed in three back-to-back US drone strikes in South and North Waziristan Agencies on Wednesday. A total of six missiles were fired by the US unmanned aircraft in three strikes carried out in various parts of both the agencies. In the first attack, a US drone hit a compound allegedly used by the suspected militants belonging to Mullah Nazir group at Malikot area near Wana, headquarters of South Waziristan Agency. As a result, ten militants were killed, while the compound was completely destroyed. The second attack was carried out after sometime, when another US spy plane fired two missiles at a moving vehicle at Sheran Algad near Wana, killing all the four persons in the vehicle which was completely destroyed. The third drone attack took place at Malak Kazdar village near Miranshah, North Waziristan Agency. The drone fired at least four missiles at a house, killing five suspected militants in the attack. Pakistan has time and again asked the US administration to halt these strikes as they fuel public sentiments against US, but to no avail. Agencies add: South Waziristan has witnessed an escalation of drone strikes this month, including in areas controlled by Nazir. Sixty-one militants have been killed since June 3, according to a Reuters count. Unlike the Taliban, Nazirs group is not opposed to the government. His commanders have said they will intensify their campaign to help drive US-led Nato forces out of Afghanistan if the drone strikes on their turf continue. Fifteen US drone strikes have now been reported in the tribal belt since US commandos found and killed bin Laden in a unilateral airborne raid in Abbottabad on May 2.