Security forces had deployed around the airport and the highway linking it to Kampala ahead of his arrival to prevent supporters from greeting him.
Ugandan security forces took pop star and opposition lawmaker Bobi Wine into custody when he arrived from the United States on Thursday, angering his supporters while authorities barred public gatherings they said threaten public order. Armoured personnel carriers and police vehicles lined the highway.
Police said they had received information that supporters of Kyagulanyi, also known as Bobi Wine, planned to stage rallies and processions on his return but had not sought permission.
Some of the journalists arrested are; Kingdom TV's Siraje Kiberu, NTV's Joel Ssenyonyi, Eve Muganga attached to Daily Monitor and radio Sapiensia news reporter Charles Katabalwa, among others.
Police took away Ugandan opposition politician Robert Kyagulanyi as he got off a plane at the country's main airport on Thursday but a police official denied he was under arrest and a government official said he had been taken to his home.
IGP Ochola in a Twitter post denied arresting the legislator, saying the police were instead ensuring his security is safe as they escort him to his Magere based home.
The 36-year-old Ssentamu says he is fighting for freedom from oppression and wants Museveni, in power since 1986, to retire. "Robert Kyagulanyi for easily cooperating with law enforcement officers at Entebbe airport, who provided him with a chauffeur driven auto, escorts and traffic clearance to Magere", Ofwono Opondo said.
Mr Kyagulanyi who is facing treason charges after President Yoweri Museveni's campaign motorcade was stoned in Northwestern Arua Municipality, was granted travel permit upon being freed on bail by a Ugandan court.
The government denies allegations of corruption and of stifling opposition.
Police escorted him there from the airport - a move which he said was against his wishes. The legal basis for the escort was unclear, and Kyagulanyi wrote on his Twitter feed before flying home that he should be able to travel freely in his country.
Police earlier arrested several people who had been trying to reach Entebbe Airport to welcome the politician back.