Ukraine security service sources tell BBC bombers "are burning en masse" - as Russia confirms Kyiv's drone attack.

According to Ukrainian security sources, a coordinated drone attack code-named “Spider’s Web” targeted four Russian airbases, including one in Siberia.

On the eve of bilateral peace talks in Istanbul, Ukraine’s security services launched a massive drone attack against five air bases inside Russia, reaching Siberia for the first time, officials in both countries said Sunday,