Serjeant-at-arms Narendra Fernando said the four MPs were identified via CCTV footage of Parliament.
Accordingly the MPs have been directed to self-isolate and will be directed to undergo PCR tests in future.
MP Rauff Hakeem was confirmed as a COVID-19 infected individual this morning.
He was confirmed to have attended the Parliament session last Tuesday.
(Except for the headline, this story, originally published by newsradio.lk has not been edited by SLM staff)