Tehran says its armed forces are ready "with their fingers on the trigger" to respond to any aggression.
Wounded demonstrators tell the BBC they are relying on medics willing to risk their own safety by treating them at their homes.
The prime minister seeks to strengthen ties with China but faces fierce criticism from opponents at home.
The BBC speaks to a person who was aboard a train on which five people died after it was targeted by drones.
State ariline Satena says its aircraft carrying 13 passengers and two crew "suffered a fatal accident".
The storm toppled trees, damaged homes and left more than 800,000 people without power.
The country cut off internet access on 8 January following a government crackdown on protesters.
The EU foreign policy chief's remarks come days after Nato's secretary general said Europe needed the US for its defence.
Officials searched offices in Frankfurt and Berlin in relation to "past business relationships".
The Minnesota Democrat was uninjured and continued to speak at her event, after being sprayed with an unidentified liquid.
