Thiruvananthapuram, Apr 27 (IANS): Kerala Chief Minister Pinarayi Vijayan said on Monday that 13 more individuals have tested positive for novel coronavirus in the state, taking the total number of people presently undergoing treatment to 123.

In all, Kerala has reported 481 Covid-19 cases so far.

"A total of 19,812 people are under observation at their homes while 489 others have been kept under observation at different hospitals across the state," said Vijayan.

"Four districts -- Kannur, Kozhikode, Kasargode and Malappuram -- are under red zone. After the rise in the number of cases, Kottayam and Idukki have been added to the red zone. Ten other districts are under orange zone," the Chief Minister said.

He said that on Sunday, Union Home Minister Amit Shah had called him and he was told that Kerala would like to see the lockdown getting lifted in a partial manner till May 15, while inter-district and inter-state movement can be allowed there in a restricted manner.

"What to do after May 15 can be decided at that time," said Vijayan.