Canada Border Services Agency officials travelled to Kamloops Wednesday to speak to four people after a possible security breach at the Canada-U.S. border south of Vancouver.

According to the CBSA, two foreign nationals were detained on Tuesday evening and handed over to the border authority on Wednesday.

“When a foreign national is arrested by police, if they have no other criminal matters pending, the person may be handed to the CBSA if there are grounds to believe they are inadmissible,” said Stefanie Wudel, CBSA spokesperson.

Kamloops RCMP say four men, two Palestinians and two Canadians, were arrested early Tuesday evening after they were found in a car that was stopped on the Coquihalla Highway with its four-way flashers activated.

According to police, the Canadians face charges of aiding and abetting.

The CBSA will investigate the foreign nationals’ admissibility to Canada and may send them to a hearing in front of the immigration and refugee protection board.

“If they’re found to be inadmissible then a removal order will be issued against them and it is CBSA’s mandate to remove inadmissible people as soon as is practical,” said Wudel.

Investigators say there is no word yet about how or when the Palestinian men crossed the border into Canada or why they were allegedly in the country illegally.