I’m thinking the same, however the article doesn’t refers to the bridge bobing you mentioned, but to an attack on Yazidis near Mosul. This attack (including the details such as fuel tankers etc.) was reported by others aswell, however they all have casualty figures at aprox. 20 dead.
I concur that unless we get real confirmation Reuters is (again) using vastly exaggerated numbers.
The YNET story came out a little after the Reuters story but no mention of such a massive blast that took 175.