MANILA - The Senate condemned the recent spate of killings during police anti-drug operations, including the killing of 17-year-old Kian Loyd delos Santos.

In a resolution adopted Sunday, the Senate also ordered the proper committee to conduct an inquiry into the possible abuses done by police officers in the campaign against illegal drugs, and their liabilities.

The resolution mentioned the anti-drug operations in Bulacan that resulted in 32 deaths in 24 hours, and the other one in Manila that resulted in 28 deaths.

"The apparent abuses by the police in undertaking these drug operations have resulted in a series of tragedies such as that of Kian Loyd delos Santos," the Senate said.

While police said the teenager was killed in a gunfight, witnesses' accounts and a CCTV footage show that he was dragged by two men before he was killed.

"Similar incidents in the past have happened in carrying out the campaign of the Duterte administration against illegal drugs," the Senate said.

The Senate also stressed that the government must always ensure that no innocent lives are unnecessarily lost in the campaign against illegal drugs.

The resolution pointed out amendments to the Philippine National Police Reform and Reorganization Act of 1998, which aim to speed up investigations by the PNP-Internal Affairs Service.

"It is hereby resolved by the Senate to express its condemnation against the recent spate of abuses by the police resulting in excessive and unnecessary deaths in the conduct of the campaign against illegal drugs, and to direct the appropriate Senate Committee to inquire and review the conduct of anti-drug operations by the PNP as well as capacitating the PNP as an institution, to hold erring officials within their ranks liable for the commission of any crime or offense," it said.

-- report from Sherrie Ann Torres, ABS-CBN News