Poland has admitted accidentally invading its neighbour, the Czech Republic, and turning locals away from a church in their own country.
The Polish military set up a border post near their village of Pielgrzymow in late May, CNN reports, but got the placement wrong.
They were meant to enforce border restrictions put in place to halt the spread of COVID-19. Poland's had its borders shut since March.
"Our Polish counterparts unofficially assured us that this incident was merely a misunderstanding caused by the Polish military with no hostile intention, however, we are still expecting a formal statement," a Czech foreign ministry spokesperson told CNN.
Czech worshippers were turned away from a local church, which the soldiers wrongly insisted was on the Polish side of the border.
"The Polish soldiers are no longer present and our citizens can again visit the site freely," the Czech spokesperson said.
"The placement of the border post was a result of misunderstanding, not a deliberate act," Poland's Ministry of Defence said.
It's not the first time a country has mistakenly invaded a friend's territory. Nicaragua invaded Costa Rica in 2010 over a Google Maps error, and in 2002 British troops were surprised to find Spanish troops in Gibraltar - only to realise they weren't in Gibraltar, and were actually in Spain.
