15:46

Our Moscow correspondent Shaun Walker says representatives of Roskosmos, the Russian space agency, are holding a press briefing in the Russian capital. We’re waiting for further details on who is speaking but we have these initial remarks from one of the representatives:

It’s impossible to say who or what is responsible for this at this point. There will be a state commission which will meet to discuss all the issues around further launches. The next launch is due on 26 May.

And Igor Komarov, head of Roskosmos, was quoted by agency LifeNews as saying: