Former British Prime Minister Boris Johnson escaped an attack that occurred while he was traveling by vehicle in the border area between Poland and Ukraine, according to reports.

Local reporting said Johnson and his party were unharmed. The circumstances and responsibility for the incident are said to be under investigation.

Johnson visited Ukraine repeatedly during and after his time in office, and this trip is reported to have been part of related engagements.

After the incident he offered remarks likening Russia's position to that of a creature driven into a corner, comments carried by local media.

The border area is a principal corridor for humanitarian goods and personnel, and security problems along it affect delivery schedules for aid.

States operate separate protection procedures for the movement of prominent figures, and routes and timings near a war zone are not normally disclosed in advance.

This paper attends to the operating condition of border corridors rather than to the remarks of individual politicians, since throughput and control hours are verifiable indicators.