Yemen Houthi fighters backed by tanks reach central Aden| Reuters
Asked for his reaction, a Saudi military spokesman said Houthi forces had been in Aden before the alliance began its campaign on March 26 and had fought daily battles against the people of the city. Tanks appearing there had always been a possibility, he said without elaborating.
The Houthis, with vital support from army units loyal to former president Ali Abdullah Saleh, emerged as the dominant force in Yemen after they took over the capital six months ago and they now control much of the Arabian Peninsula country.
Aden residents said they saw large groups of fighters carrying rocket propelled grenades accompanied by tanks and trucks mounted with machine guns in the Khor Maksar district - part of a neck of land linking central Aden to the rest of the city.
Many people fled the area and some were trying to get on a ship leaving the port.
Earlier on Wednesday, dozens of fighters were killed in clashes between Houthi fighters and their army allies on one side, and militiamen and tribesmen opposing them around Aden and elsewhere in south Yemen, witnesses and militia sources said.
One witness saw the bodies of eight Houthi fighters and three pro-Hadi militiamen lying on the streets of Khor Maksar amid sporadic gunfire, as well as snipers mounting positions atop homes.
Joining Yemen campaign not declaration of war: Morocco Anadolu Agency
01 April 2015 20:52 (Last updated 01 April 2015 21:23)
Morocco said Wednesday, joining Yemen campaign not declaration of war
RABAT
Morocco said Wednesday that it had joined a Saudi-led military campaign against Yemen's Shiite Houthi group to "defend legitimacy" in the crisis-hit Arab country, insisting that its participation did not amount to a declaration of war.
"We have participated in the Saudi-led campaign to defend legitimacy and demonstrate our rejection of any action that could threaten Yemen's territorial integrity," government spokesman Mustapha Khalfi said at a press briefing in capital Rabat.
He added that his country had contributed to previous peacekeeping missions and had cooperated with the United Arab Emirates in the fight against the Daesh militant group.
He stressed that Moroccan participation in the
Yemen campaign should be viewed in the context of "Arab solidarity."
Several other Arab states have joined the Saudi-led campaign against Yemen's Houthis, including Jordan and Egypt.
Saudi Arabia says the campaign comes in response to appeals by Yemen's embattled president, Abd Rabbuh Mansour Hadi, to "save the [Yemeni] people from the Houthi militias."
Yemen has remained in turmoil since last September, when the Houthis overran capital Sanaa, from which they have since sought to extend their influence to other parts of the fractious country.
Some Gulf States accuse Shiite Iran of supporting Yemen's Houthi insurgency.