CAIRO — Islamist parties are the top two vote-getters after the first two phases of elections for Egypt's new parliament, but despite fears of a hard-line coalition, serious divisions have erupted between the two main Islamist groups before the parliament has even been seated.

The tensions between the Muslim Brotherhood and Salafist groups have raised questions about how Egypt's first parliament convened since President Hosni Mubarak's resignation in February will perform amid ongoing instability and protests against the country's interim military rulers.

In the second phase of elections, whose results were announced last week, the Muslim Brotherhood's political wing, the Freedom and Justice Party, maintained its leading position, raking in more than 4 million votes. It was followed by the Al Nour Party of the Salafists, a more hard-line Islamist group, with about 3.2 million votes.

Mohamed Morsi, head of the Freedom and Justice Party, dismissed talk of forming an alliance with the rival Salafists soon after results were announced by the Higher Electoral Committee on Saturday morning. Although only partial results are available, both parties together control roughly half the parliamentary seats, with the Brotherhood holding about 30 percent.

"There is no alliance. ... I don't think it will happen any time soon due to conflicting ideologies," Morsi told Al Mehwer, an Egyptian cable channel, on Monday.

The Salafists agreed. "Any coalition with the Muslim Brotherhood is far from possible," said Nader Bakkar, the official spokesman of Al Nour Party. "We have significant differences and we don't think that we will be able to build any form of coalition with them."

The Brotherhood, meanwhile, formed an 11-party election bloc called the Democratic Alliance, which includes the prominent liberal parties Al Ghad ("Tomorrow") and Al Karama ("Dignity"). Asked whether U.S. officials welcomed the Brotherhood's outreach to liberal groups, State Department spokesman Mark Toner said earlier this month that it signaled "a very positive start" for the new parliament, which is expected to be seated on Jan. 23.

"I think we find that encouraging that there's politics going on there, that there's these kinds of discussions ... taking place," Toner said. "Again, it's very, very early. We just have preliminary results. There's a lot of elections that need to still be carried out, but we're off to a very positive start."

Although Salafists and the Muslim Brotherhood were both officially outlawed here for decades — members of the groups have shared prison cells — Salafist leaders have made several statements that have alarmed Egyptians and underscored their differences with the more moderate Brotherhood.

Abdel Monem el Shahat, a prominent Salafist cleric and a leading figure in the Al Nour Party, recently described the ancient Egyptian civilization as "rotten" and called for the country's Pharaonic statues to be covered in wax because they resembled those worshipped in pre-Islamic times.

The Egyptian Coalition for Tourism Support filed legal action against el Shahat on behalf of tourism companies, which complained that tourists canceled trips to Egypt after his remarks. El Shahat ran in the first phase of elections and lost his seat to a Muslim Brotherhood candidate.