Police in Delhi have arrested five suspects in connection with Monday's bombing attack that wounded the wife of an Israeli diplomat.
Delhi officials also said they identified a red motorcycle they believe was used to stick the bomb on the car.
Tal Yehoshua Koren, the wife of an Israeli Defense Ministry attaché at the embassy in Delhi, and her driver were both injured in the explosion.
Police officials did not reveal the suspects' identities, or indicate whether they were tied to Iran or Hizbullah.
Indian police officials say security camera footage revealed the face of the attacker who allegedly attached the bomb to the rear of the car.
They said the footage showed the attacker carrying a bag and the explosive that was stuck to the car.
However, the Times of India reported that sources close to the investigation revealed Dehli intelligence officials believe Iran carried out the attack via local proxies.
They noted the bomb used in the attack was of a type never before seen in India and was created by a "foreign expert."
While Indian officials are being cautious with over USD 10 billion in annual trade with Tehran, they have vowed "there will be consequences" if Iran is found to be involved.
India consumed 12 percent of Iran's exportable oil, but importers are demanding new sources of oil as sanctions make payment to Iran increasingly difficult.
Saudi Arabia has offered to step in and replace rival Iran's exports to India amid the crisis.
The arrests in Dehli come on the heels of two Iranian men being arrested in Bangkok, Thailand in connection with explosions Tuesday in the capital. One of the arrested men had been about to board a flight out of the country.
A third suspect who crossed the border from Thailand to Malaysia was arrested later on Wednesday in Kuala Lumpur, according to reports.
Israeli ambassador to Thailand, Itzhak Shoham, told the Associated Press on Wednesday that bombs found in the blown-up home of the Bangkok suspects were similar to those used in the attacks on Israeli Embassy employees in Delhi and Tiblisi.
Israeli Prime Minister Benjamin Netanyahu on Wednesday again blamed Iran for the attacks.
"Iran's terror operations are now exposed for all to see," Netanyahu said in the Knesset plenum. “Iran is targeting innocent diplomats around the world. If this aggression isn't halted, if red lines are not clearly drawn, Iran's aggression will ultimately spread to many other countries."