Per the Jerusalem Post.
“A terrorist blew up [the #142] bus on Shaul Hamelech Street in Tel Aviv around noon Wednesday.
Police confirmed that the explosion was a terrorist attack, although Channel 2 reported that it was not a suicide bombing and thus police were searching the area for additional explosive devises.
Channel 2 reported that police arrested a suspect near the Ramat Gan diamond exchange, who they believe may be carrying an explosive device. Police believe a female terrorist may still be at large in the area, armed with explosives.”
Haaretz is reporting 21 injuries.
Celebratory gunfire was heard in Gaza in reaction to the attack, which was praised by Hamas.