Detailed Instructions: In this task, you are given a sentence in the Japanese language and your task is to convert it into the English language. In translation, keep numbers as it is and make it sentence case (capitalize only the first word of each sentence and noun).
Problem:建設と封鎖が始まった時、150名ほどのイスラム教信者が朝の礼拝のためにモスク内部にいた。
Solution:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Around 150 Muslims were inside the mosque for morning prayers when the construction and blockade began.