Incumbent President Denis Sassou Nguesso, 82, is running for fifth term in polls boycotted by major political parties.
A small anti-war protest was held in Tel Aviv, criticising Israel’s attacks on Iran.
Medvedev, who arrived in the US after leaving the UAE via Oman amid Iranian attacks. ends the world no 1's 16-match run.
Vietnamese elect members of parliament from a list of candidates almost exclusively fielded by the governing party.
Cars were seen burned and one overturned in in Tel Aviv district caused by shrapnel after a wave of Iranian missiles.
Syrians celebrate the start of the 2011 uprising that, in 2024, put an end to Bashar al-Assad's rule.
Iraq's Iranian-backed Kataib Hezbollah has released drone video from an attack on the US's Victory Base in Baghdad.
Iran has held a funeral for the country's most influential defence figure, Ali Shamkhani.
A US-Israeli strike on a factory in Isfahan has killed least 15 people, according to Iranian media.
Former CIA chief David Petraeus says the US attacked Iran to scuttle its ability to defend itself against Israel.