The Police and Border Guard Board has said the ice on Lake Peipsi, which straddles the border between Russia and Estonia, is now thick enough for hikers, fishermen and lighter vehicles such as ATVs and snowmobiles.
Ice has thickened to between 15 and 20 centimeters in most areas of the 2,611-square kilometer lake, and the two connecting lakes of Lammijärv (236 km2) and Pihkva (708 km2), the board said in a press release on Tuesday.
A ban on walking on ice near Piirisaar and Salusaar islands, between Peipsi and Lammijärv, and within 150 meters of deltas, is still in effect.
Those planning walks on the sea near coastal areas or on other rivers and lakes should seek further information from local border guard branches.
On Sunday, four people were pulled from their vehicles that sank through the ice near Pärnu, with one person missing and feared drowned.