* Arrests of opposition lawmakers continue amid protests
* Opposition leader arrested while giving media interview
* Government says it cannot implement order to reinstate opponents
* State of emergency extended after first declared Feb. 5
* Emergency declared over 'national security threats' (Adds govt comments, background, paragraphs 10-11, 18; adds bullet points)
By Mohamed Junayd
MALE, Feb 27 (Reuters) - Maldives police arrested at least another four opposition members under state of emergency laws for protesting against President Abdulla Yameen's government, the opposition said on Tuesday.
The top court in the Maldives validated last week a 30-day extension of the state of emergency, which was sought by Yameen over what he has called a national security threat and constitutional crisis.
Opposition politicians defied a police order to stop protesting after 10.30 pm local time on Monday (1730 GMT) and continued to demand that Yameen implement a Supreme Court ruling that quashed convictions against nine opposition leaders and ordered the release of politicians and officials held in prison.
The Maldivian Democratic Party, the main opposition party, said on Twitter police had arrested Mohamed Ameeth and Abdulla Ahmed, two lawmakers who had defected from Yameen's party, and two more from other opposition parties late on Monday.
Independent television Raajje TV, which showed footage of police forcibly blocking protesters, said Abdulla Ahmed was arrested while giving a media interview about the protest.
Yameen's government has so far ignored international calls to lift the state of emergency, first declared on Feb. 5 for 15 days, and release opposition leaders from jail.
The Council of the European Union threatened the Maldives on Monday with "targeted measures" if the crisis did not improve.
"The Council condemns politically motivated arrests and calls for the immediate release of all political prisoners," the EU said in a statement.
"The Council also condemns any interference with the work of the Supreme Court of the Maldives and actions taken against the judiciary and the judges," it said.
The Maldives foreign ministry said in a statement there was no legal mandate to implement the Supreme Court order, which also included reinstating 12 lawmakers stripped of their parliamentary seats by Yameen's party for defecting last year.
"The government will ensure that the state of emergency is lifted as soon as the threats posed to national security are addressed satisfactorily," the statement said.
DIFFICULT STEPS
Countries including the United States, Canada, and neighbouring India, along with the United Nations, have urged Yameen to lift the emergency.
Tour operators say hundreds of hotel bookings have been cancelled daily since the emergency was imposed, despite government assurances that all was normal in Indian Ocean resort islands far from the capital. government said in a statement on Monday it had to take difficult steps to safeguard the constitution and ensure that civil and political rights were protected.
The prosecutor general has said the extension of the state of emergency was unconstitutional because parliament did not have the required quorum when it voted last week. the three-judge Supreme Court, which is functioning without a chief justice, said late on Monday the parliamentary vote on the extension was valid.
Under the emergency, Yameen's administration has arrested the chief justice, another Supreme Court judge and former president Maumoon Abdul Gayoom on allegations of attempting to overthrow the government.
Yameen has also fired two police chiefs who said they would uphold the court's rulings. His government retains a majority in parliament in the absence of the 12 MPs stripped of their seats. (Additional reporting and writing by Shihar Aneez; Editing by Paul Tait)