This was reported by Censor.NET, referring to Ukrainska Pravda.
More than a thousand Mariupol residents formed a human chain at the city checkpoint towards Novoazovsk. Eyewitnesses of the event report about it on social media. The chain
"Live chain in Mariupol. There are up to thousand people", the Polish journalist Paul Penonzhek wrote about it on his Twitter.
In turn, the Dutch journalist Olaf Koons added that there are many women and children among the participants.