The rights group Amnesty International has accused Nigerian authorities of forcibly evicting 1.2 million people from their homes over the last five years.
Amnesty has released a report on the evictions compiled with a Nigerian group, the Social and Economic Rights Action Center.
In the most recent instance cited in the report, Amnesty says government forces seized and demolished homes, churches and a mosque in a Lagos neighborhood last April, leaving 3,000 people homeless.
It says nine months later, hundreds of people from the Makoko neighborhood are still sleeping out in the open.
Amnesty says the evictions amount to a "grave violation of human rights," and has called on the Nigerian government to immediately make sure they stop.
Nigerian officials have not yet commented on the report.