A malfunctioning Ukrainian naval drone has caused an explosion at a key Black Sea port in Romania. Kyiv has blamed Russian jamming for its air and sea drones veering off into Nato countries Key points and original sources are listed below.

• A malfunctioning Ukrainian naval drone has caused an explosion at a key Black Sea port in Romania.S1

• Kyiv has blamed Russian jamming for its air and sea drones veering off into Nato countriesS2

• A naval drone exploded near an oil terminal in the Romanian Black Sea port of Constanta on Friday morning, causing no injuries. The Russian embassy in Bucharest claimed the device was Ukrainian. DW has more.S3