Hundreds of cargo trucks are stuck on the Ugandan side of Ishasha border crossing, as fighting intensifies in eastern Democratic Republic of Congo.
Sostine Buregyeya, a local leader and businessman in Ishasha, told newsmen that some of the trucks had been stuck at the border for three weeks for fear of insecurity in DR Congo.
Ugandan exports to the DR Congo are valued at over $300m (£252m) and Ishasha is one of the main crossings between the two countries.
Opiyo said that he was forced to sell some of his dried fish cargo locally at throw away prices and is still stuck with some 40 tonnes in a store at the border.
Efforts to bring peace to eastern DR Congo are being championed by East African Community leaders, as well as Angolan President João Lourenço, who is hosting a summit in the capital, Luanda, on Wednesday.
Fighting between the Congolese government and the M23 rebels has intensified in recent weeks, with the rebels capturing more territory.