SINGAPORE - The Islamic Religious Council of Singapore (Muis) has urged the local Muslim community to remain vigilant and guard against radical behaviour.

In a statement on Tuesday (June 6), the council said it was "saddened" by the wave of terrorist attacks across the world, including Saturday's events in London.

The Islamic State in Iraq and Syria militant group has since claimed responsibility for the London attack, which killed seven and injured dozens.

Noting the frequency and proximity of recent attacks especially during the fasting month of Ramadan, Muis reminded Muslims in Singapore to be aware of signs of change in behaviour of family members and friends.

"If you think that they are coming under extremist influences, you must seek help from credible resources such as the Religious Rehabilitation Group," the statement said.

"By doing so, you care for all your loved ones, and for everyone in the community."

Muis also condemned the acts of terror and violence as "reprehensible" and desecrating the holy month, adding that they are totally against the teachings of Islam.

Its comments on guarding against extremist behaviour mirror Law and Home Affairs K. Shanmugam's remarks on Sunday, when he stressed the need for people to alert security agencies to family members and friends who show signs of radicalisation.

"You are helping that person, you are helping society, you are helping the country. When you keep quiet and an attack like this happens... you are doing a serious injustice to the system," said Mr Shanmugam.

Last week, the Home Affairs Ministry released a report that said the threat of terrorism to Singapore was at its highest in recent years.

More information on terrorism-related arrests in Singapore and what families did or did not do will be released in the coming weeks, Mr Shanmugam added.