Due to challenges at the Polish border brought on by a truckers’ strike, food supplies from Ukraine by road fell 5.2% in the first 20 days of November, brokers reported on Wednesday.

On the messaging app Telegram, Spike Brokers, which frequently monitors and disseminates export data from Ukraine, reported that 327,000 metric tons of agricultural products were shipped by truck between November 1 and 20, down from 345,000 tons over the same time in October.

Polish truckers have blocked roads to three border crossings with Ukraine to protest against what they see as government inaction over a loss of business to foreign competitors since Russia’s invasion of Ukraine in February 2022.

“The passage of vehicles through customs checkpoints on the border with Poland is continuing to decrease and totalled 3,700 tons of cargo per day, compared to the peak of 7,500 tons per day a month earlier,” Spike Brokers said.