Istanbul, 3 June 2023 (dpa/MIA) - Turkish President Recep Tayyip Erdoğan took office on Saturday as he swore his parliamentary oath for a new term in the capital, Ankara.

He will adhere to secular republic values and uphold human rights, Erdoğan read in his oath, which was applauded by lawmakers from his governing bloc. Opposition members did not stand up as Erdoğan took the oath, despite the rules, in an act of protest.

Erdoğan won the May 28 run-off presidential election, gaining another five-year term that tightens his grip on power after 20 years of rule.

The opposition criticized the 69-year-old president for what they call his "authoritarian" tendencies and an unfair election campaign.

Erdoğan received his mandate from Devlet Bahçeli, who leads his allied nationalist MHP party and is acting house speaker. The ceremony was followed by a 101-gun salute.

The president is scheduled to visit the mausoleum of modern republic's founder Mustafa Kemal Atatürk, attend an inauguration ceremony at his presidential palace and host foreign visitors for a state dinner.

Later, the president is expected to announce his cabinet.

More than 30 heads of state and prime ministers are expected to join Erdoğan's inauguration ceremony in Ankara, including from South Africa, Venezuela, Pakistan and Libya, according to state news agency Anadolu. Russia and China are among those sending representatives.

NATO Secretary General Jens Stoltenberg is also due to attend and is to hold separate talks with Erdoğan, NATO said. His visit comes as NATO raises the pressure on member Turkey to end its opposition to Sweden joining the alliance.

Local media speculated that Erdoğan would include former aides such as ex-economy tsar Mehmet Şimşek in his new cabinet.

On Friday, Turkey's new parliament convened for the first time following the May 14 elections.

Erdoğan and his nationalist, Islamist allies form the largest bloc in the 600-seat house. However they lack the majority needed to make key legal changes.

The president can still pass some legislative changes by decree, though, under his powers as executive president since 2018.