US President Joe Biden, in a phone call with Israeli Prime Minister Benjamin Netanyahu, expressed his "grave concern" Saturday over the flareup of violence in Israel and Gaza, the White House announced. Speaking on the sixth day of a paroxysm of Israeli-Palestinian violence that has left scores dead or wounded, Biden expressed his "strong support" for Israel's right to defend itself against rocket attacks by "Hamas and other terrorist groups." But he also raised concerns about the safety of journalists after Israeli planes flattened a building in Gaza housing The Associated Press and other media outlets, according to the statement. bbk/acb