Israel deployed attack drones and increased its surveillance over the besieged Gaza Strip, Haaretz reported on Thursday, fearing retaliation after its arrest of a senior Palestinian militant earlier this week. In an escalation of its 15-year-long siege, Israel shut all crossings into Gaza on Tuesday after it arrested Bassam al-Saadi, a senior member of Palestinian Islamic Jihad (PIJ), an armed group active in the Palestinian enclave. The shutdown has stopped the transport of goods and aid into Gaza and prevented workers from crossing into Israel. Gaza’s only power plant is also at risk of immi…