More than half the Malaysia coronavirus cases were linked to a global Islamic event attended by almost 20,000 people in February.
"Of the 428 cases, 243 are participants from the religious event in Sri Petaling mosque," said Noor Hisham Abdullah, director-general of the health ministry, AFP reported.
Authorities said participants at the gathering from February 27 to March 1 came from Bangladesh, Brunei, the Philippines, Singapore and Thailand.
Around 14,500 of the participants were Malaysian.
Brunei reported some 40 cases on March 14, most in people who attended the Malaysia gathering.
Singapore has also announced cases linked to the event.
On March 13, Prime Minister Muhyiddin Yassin warned Malaysia of a second wave of infections spread and urged people to avoid mass gatherings.
Ahmad Farouk, a lecturer at Monash University, said that authorities should shut down mosques for at least two weeks to contain the spread of the virus.