PARISA HAFEZI  A senior Iranian official has revealed that an opposition group was suspected alongside Israel in the killing of a prominent Iranian nuclear scientist, an attack that has raised the prospect of a new standoff between Tehran and its longtime enemy. Iran's English-language Press TV reported the weapon used in Friday's killing of Mohsen Fakhrizadeh was made in Israel. "The weapons collected from the site of the terrorist act bear the logo and specifications of the Israeli military industry," an unnamed source told Press TV. In Jerusalem, there was no immediate reply from Israeli officials contacted for comment on…