Ukraine: Disbelief in Mariupol as a maternity and children's hospital is bombed

Ukraine's President Volodymyr Zelensky has accused Russia of committing a war crime by bombing a maternity and children's hospital in the besieged city of Mariupol.

The United States says Russia could use chemical or biological weapons in Ukraine or create a so-called "false flag" operation that uses them.

And how Russia seeks to keep control of news within the country, we hear from a veteran Russian journalist in exile.