Security around 100 rat trails along the Peninsular Malaysia's west coast has been further tightened to prevent foreigners from entering the country, said Bukit Aman Internal Security and Public Order Department (KDNKA) deputy director Mastor Mohd Ariff.

He said personnel from the General Operations Force (GOF), marine police and Malaysian Maritime Enforcement Agency (MMEA) through Op Benteng have been mobilised at the trails to prevent new COVID-19 clusters.