"The testing strategy will be revised to reintroduce mandatory testing for persons admitted for in-patient treatment, intensify the testing of medical personnel, and tighten the rules for visitors," he told a news conference.
The government's COVID-19 crisis management committee took the decisions on Monday in response to a coronavirus outbreak in a hospital in the northern town of Radviliskis, currently the biggest coronavirus hotspot in the country.
Sixty-three coronavirus cases are now linked to the hospital, including 35 patients, 26 staff members, and two secondary infections.
Lithuania reported 179 new coronavirus cases over the weekend, including 99 on Saturday, the biggest daily rise since its first registered infection in February.
The country has so far confirmed a total of 3,814 coronavirus infections, including 1,511 active cases and 2,199 recoveries.
Eighty-seven people have died of COVID-19 in the country, and another 17 coronavirus-infected patients have died of other causes.