GAZA CITY, Gaza Strip — Egyptian attempts to broker an end to a monthlong war between Israel and Hamas militants collapsed in heavy fighting Tuesday, with Palestinian militants firing dozens of rockets and Israel responding with airstrikes across the Gaza Strip. At least two Palestinians were killed.The burst of violence erupted in the hours before a temporary truce was set to expire. It left the Egyptian mediation efforts in tatters, and raised the likelihood of a new round of violence.Israel withdrew its delegation from the Cairo cease-fire talks following a sudden burst of rocket fire on Tuesday afternoon, and quickly resumed its campaign of airstrikes.Palestinian officials reported Israeli airstrikes throughout Gaza that gained intensity throughout the evening.Palestinian medical official Ashraf al-Kidra said two people — a 40-year-old woman and a 2-year-old girl — were killed in an airstrike in Gaza City. A total of 21 people were wounded in a separate airstrike that hit a building that houses offices of Hamas’ Al Aqsa TV station, he said.The fatalities were the first since a temporary truce was reached last Wednesday.Israeli officials reported at least 20 rockets fired late Tuesday, including one that set off air raid sirens in the metropolis of Tel Aviv. There were no reports of injuries.