Access to the social media platform X is limited to Tanzania after some official accounts of government and private institutions were directed by hackers.
On Tuesday, the official police account was compromised, with sexually explicit materials and false information that the president was killed.
Police were separated from the information and stated that an investigation was being conducted to identify the responsible ones.
Hours later data from the Internet Observation Organization NetBlocks has shown that X is “inaccessible to big internet providers” all over the country.
Dar Es Salam users, the largest city in the country, cannot yet have access to the site on Wednesday unless they use virtual private networks (VPN), which is illegal without permission, although some people in other regions have indicated that they are able to enter.
Authorities have not commented on whether they were blocking access to X.
But the information minister Jerry Silaa acknowledged the hacking and assured Parliament MPs that the government accounts affected in social media have been secured ever since.
Earlier, the government spokesman Gerson Missuw warned those responsible that immediate action was being taken.
Problems with access to X come against the background of the ongoing disturbance over the deportation of prominent Kenyans – a move that prevented them from attending the trial of opposition leader Tundu Lissu, who is charged with betrayal.
On Monday, the President warned activists from their northern neighbor that she would not allow them to “interfere” in the affairs of their country and cause “chaos”.
She spoke after former Kenya Justice Minister Martha Carua, along with some others who were traveling to attend Lisu's court case, were deported.
Another Kenyan activist, Boniface Mwangi and Ugandan Agather Atuhaire were arrested in Dar Es Salam by suspected military officers on Monday and their location remains unknown.
The Tanzan authorities have not commented on their location.
Mwangi's wife, Njeri, told the BBC Newsday program that she last heard from him on Monday and failed to determine where she was.
“I'm actually concerned about his life. I know my husband would communicate, he would find a way to call me or send me a message, and since he didn't make me, he was very worried about what condition he was,” she said.
Boniface Mwabukusi, President of the Tangania Legal Society, the body representing lawyers in the mainland of Tanzania, said on Wednesday that they had learned that the two were held by the immigration department. Earlier, he said they had been deported.
“Our legal team on the spot actively monitors the situation and explores appropriate legal remedies to facilitate fair and timely resolution,” he told X.