An aircraft belonging to Algerian President Abdelaziz Bouteflika landed at a military airport near Boufarik on Sunday while ongoing anti-government protests took place 40km north in the country's capital, Algiers.
The plane left Geneva earlier in the day, but it was not clear whether the 82-year-old was on board.
He has been receiving treatment at a Swiss hospital for the last two weeks for an unspecified condition.
Thousands of people have taken part in anti-government protests in the last few weeks, challenging Bouteflika's bid to stand for a fifth term in next month's election.
Despite promising to stand down should he secure another term, protesters have not been swayed.
On Sunday, a huge demonstration was staged in the Algerian capital of Algiers, while members of the Algerian community in France also gathered for protests in Paris.