Sayyed Mohammad Al-Musawi, Sayyed Mohammad al-Musawi is originally from Iraq and heads up the World Ahlul Bayt Islamic League in London. Other than being involved in various humanitarian projects, he frequently responds to... Answered 2 years ago

Anyone who claims a prophet after the greatest Holy Prophet (SAWA) is
a non-Muslim because his claim contradicts and denies what the Holy
Prophet (SAWA) himself said (No prophet after me) and what the Holy Qur’an clearly mentions
that the Holy Prophet (SAWA) is the last and final Prophet ( ref :
Surah Al Ahzab : Verse 40).

Non-Muslims are not allowed in any mosque.