According to the BBC News, Muslims form a minority in Lagos.
http://www.bbc.com/news/world-africa-36673985

Mr Shabi said noise levels had been reduced by about 35%, but this was not a "pass mark yet".

"Enforcement is a continuous exercise and we have set a target for ourselves. We want to ensure that Lagos is noise-free by the year 2020," he said.

Mr Shabi said mosques complied with their instructions more than churches because when they are ordered to shut down, they "instantly bring down their speakers or reduce the noise they make''.

Nigerians are extremely religious, with a large number of evangelical churches operating in Lagos.
[size=18pt]
Christians form the majority in the city.[/size]

In 2014, 116 people died when a building owned by popular televangelist TB Joshua collapsed in Lagos.

That's true islam is on a steep decline in lagos.

Cc: demmzy15