"All Indian nationals are once again advised to leave Yemen, given the prevailing security situation," said the the external affairs ministry.
The ministry has appealed to the nationals to "urgently approach" Indian mission in Sana'a.
The helplines provided are: +967 734 000 657 (all calls), +967 711 880 938 (only for local calls).
They can fax at the number: +967 1433 630
email on: email@example.com and mailto:firstname.lastname@example.org.
These will be in use till Jun 11, said the ministry.
"Not even a dozen of our nationals, have availed of the mission's help in the past few days and actually left Yemen," said the ministry on nationals not availing help from the helplines as the situation in Yemen is getting worse.
The Indian nationals and the PIOs were issued advisories to not get out of their houses or exit unless necessary on May 27 and Jun 5.
Clash between unidentified gunmen and army on Monday, Jun 6, left 19 people dead in the country.
On Monday night, clashes between army troops and unidentified gunmen left 19 people, including three children, dead in two Yemeni provinces. Amidst surging protest in the country, Yemen President Ali Abdullah Saleh, who was wounded during the opposition tribal army's shell attack on palace, flew to Saudi Arabia for medical treatment.