MANILA (Reuters) - Senators in the Philippines on Tuesday joined activists and child protection groups in condemning a lower house move to reduce the age of criminal liability from 15 to nine, calling it extreme and unjust.

FILE PHOTO - President Rodrigo Duterte speaks after his arrival, from a visit in Israel and Jordan at Davao International airport in Davao City in southern Philippines, September 8, 2018. REUTERS/Lean Daval Jr.

The proposal has President Rodrigo Duterte’s support and is being revived by his Congressional allies, having been filed on his inauguration day in 2016 along with a bid to re-introduce the death penalty - moves touting his crime-busting credentials.

The plan was approved on Monday by the lower house’s justice committee, but still needs several readings before a house vote. It would then require counterpart legislation and approval of the Senate, members of which appear less supportive.

“It is anti-family, anti-poor and simply unjust. Moreover, it will promote a heartless and ruthless society that has no regard for its own people,” said Antonio Trillanes, one of Duterte’s biggest critics.

Risa Hontiveros said the idea went against Philippines’ international commitments and a global trend of raising, not lowering, the criminal age.

“Why do we want to slide back to the minimum, or even below the minimum? Is this a race to the bottom?” she told a Senate hearing.

Duterte campaigned aggressively on eliminating crime, drugs and corruption and has said he has since realized they were all on a greater scale than he had imagined.

Despite a war on drugs that has killed thousands of people and graft-related scandals and resignations of his own appointees, Duterte has not lost his luster among Filipinos, who polls show back his morality-centered approach to law and order.

Senator Panfilo Lacson said nine was too young, but he supported lowering the age “to a certain level”. Joel Villanueva said the bill needed a rethink, to target parents more.

“Children in general have different levels of maturity and discernment,” he added.

International organizations have expressed alarm, including UNICEF and Save the Children, while domestic activists said children should be protected from criminals, not held liable for things they were forced to do.

Agnes Callamard, a United Nations special rapporteur who has frequently locked horns with Duterte, called it a “dangerous and potentially deadly proposal. Just shameful”.

Justice committee chairman Salvador Leachon, however, said the bill was misunderstood, and was rehabilitation-centered, and “pro-children”, with non-compliant parents the ones who would go to jail.

“The point here is there is no punishment,” he told news channel ANC. “It’s rehabilitation, reformative, taking care of the family.”