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LA PAZ, Jan. 28 (Xinhua) -- Bolivian presidential candidate Luis Arce, who is running for the leftist Movement Towards Socialism (MAS) party, returned on Tuesday to Bolivia to start the campaign for the general elections to be held in May.

Arce was met at the airport by scores of supporters and his running mate David Choquehuanca. Both served under ex-president Evo Morales, Arce as economy minister and the latter as foreign affairs minister.

He was also scheduled to meet the members of the MAS party serving in the Plurinational Legislative Assembly Tuesday afternoon.

However, moments after Arce flew to Bolivia from neighboring Argentina to begin his campaign, he was asked to appear before the Public Ministry on Wednesday to make a declaration regarding the alleged mishandling of a so-called Indigenous Fund, local media said.

Bolivians will be electing a new president on May 3 for the second time in eight months, after hard-right factions rejected Morales' reelection to a fourth term in October, citing electoral fraud.

Arce was picked as presidential candidate for MAS party on Jan. 19 by Morales, also the party's founder, who made the announcement in Argentina's capital Buenos Aires, where he was granted political asylum after being forced out of office in November.