Given a sentence in the Japanese, provide an equivalent translation in Bahasa Indonesia that retains the same meaning through the translation. In translation, keep numbers as it is.

9月以降パリ郊外で、4回の異なる待ちぶせ襲撃で警察官が重症を負った。
Dalam 4 penyergapan terpisah, para petugas polisi terluka parah di pinggiran Paris sejak September.