Complete the text with the passive form of the verbs

A series of mysterious lights [ ] above Cambridge late Sunday night. Video footage of the unusual sighting [ ] by eye-witness Steven Morgan, an amateur astronomer. The strange phenomenon [ ] by Morgan while he was studying a passing meteor shower. In an interview with local journalists, he claimed the lights were a bright blue colour. At the moment, the video footage [ ] by experts at London University to determine whether it is a hoax. An official report [ ] yet. However, it [ ] by some who have viewed the video that the lights were fireworks from a nearby festival. Expert opinion on the matter [ ] in the upcoming days.