The blast took place in the evening near the Israeli embassy in the national capital. During this time, there was no loss of life or property. Security has been beefed up near the Israeli embassy as a precautionary measure. Police have not found any explosives so far. A search operation is underway and the entire embassy staff is safe, the officials said. Sources in the Delhi Police said a letter addressed to the Israeli ambassador was found in the garden behind the embassy where the blast took place. Officials said that the authenticity of the letter should be verified.