Philippine Catholic Church slams 'reign of terror' behind war on drugs

* Bishops' letter read out at weekend church services

* Letter is Catholic Church's strongest attack on crackdown

* Bishops voice concern about indifference of many to bloodshed (Updates after letter read out, adds detail from police church)

By Clare Baldwin and Manuel Mogato

MANILA, Feb 4 (Reuters) - The Philippines' Catholic Church assailed President Rodrigo Duterte's war on drugs for creating a "reign of terror" among the poor, in sermons read out at Saturday services that will be repeated to congregations across the country on Sunday.

In its most strongly worded attack on the crackdown on drug pushers and users, the Catholic Bishops' Conference of the Philippines said killing people was not the answer to trafficking of illegal drugs, and it was disturbing that many didn't care about the bloodshed, or even approved of it.

"An even greater cause of concern is the indifference of many to this kind of wrong. It is considered as normal, and, even worse, something that (according to them) needs to be done," the bishops said in a pastoral letter, a copy of which was obtained by Reuters.

"An additional cause of concern is the reign of terror in many places of the poor. Many are killed not because of drugs. Those who kill them are not brought to account," they said.

More than 7,600 people have been killed since Duterte launched his anti-drugs campaign seven months ago, more than 2,500 in what police say were shootouts during raids and sting operations.

Both the government and police have strenuously denied that extrajudicial killings have taken place. The president's office had no immediate comment on the bishops' letter.

Beginning with Mass services on Saturday evening, priests read out the letter signed by the bishops of Asia's biggest Catholic nation. Their address did not mention Duterte by name, but urged "elected politicians to serve the common good of the people and not their own interests" and called for steps to tackle "rogue policemen and corrupt judges".

Nearly 80 percent of the Philippines' 100 million people are Catholic and, unlike in many other countries where the faith has waned, the majority still practice with enthusiasm. While that support has historically given the Church significant political and social clout, it has been hesitant to criticise the blunt-spoken president's war on drugs.

In interviews with Reuters last year, more than a dozen clergymen said they were uncertain how to take a stand against the killings given the popular support for Duterte's campaign. Some said challenging him could be fraught with danger.