A report from Anadolu Agency (Turkey) sets out the main available details, with claims kept attributed to their sources.
A building collapse in Athens' historic Plaka district killed six people, including four American tourists, in what is believed to have been a gas explosion.
Emergency teams found the victims, including four American tourists, after the two-storey building collapsed in a matter of seconds.
Four Americans and a Greek national are also among those killed in a suspected gas explosion, officials said.
A blast has destroyed a property close to the Acropolis in Athens, with local media reporting that US tourists and a UK national are among those unaccounted for.
Local media report the destroyed property included a holiday rental, with US tourists and a UK national among those unaccounted for.
The two leaders also explored ways to deepen bilateral economic ties, according to Anadolu Agency.