Designation for slain officers indicates they were on essential assignments; their deaths follow recent killings of other high-ranking IRGC members

Local Thai reports claim police warned to be on lookout for Iran nationals, as Israel said to mull expanding travel warning amid fears of Tehran revenge plot

After advisory issued against visiting Turkey, TV report cites concerns Iran may see Israelis traveling abroad over summer as potential targets

Officials tell NYT Israel didn't kill officer suspected of providing intel that led to colleague's slaying; report comes as it emerges Iran scientist died in unclear circumstances

Incident last month came two days after Greece confirmed it would send Iranian oil from a Russian-flagged tanker to US in line with sanctions

IRGC reportedly throws Col. Ali Esmailzadeh from his roof, frames his death as a suicide, over suspicions he leaked information related to assassination last month

Secretary speaks with Greek counterpart, calls for immediate release of vessels captured days after Athens said it would deliver to US Iranian oil it seized from Russian tanker

Direct warnings come after National Security Council publishes dire travel advisory, as Israel braces for Tehran's retaliation to assassination of senior IRGC officer

Tehran has vowed revenge for killing of senior Revolutionary Guards officer, prompting Israel to ramp up its air defenses and issue travel warning for Turkey

Security officials said worried about drone or missile attacks by Tehran-backed groups in countries that border Iran; IRGC chief blames 'the Zionists' for colonel's assassination